diff --git a/itext.tests/itext.sign.tests/itext/signatures/IssuingCertificateRetrieverTest.cs b/itext.tests/itext.sign.tests/itext/signatures/IssuingCertificateRetrieverTest.cs
new file mode 100644
index 0000000000..f7ab08a14a
--- /dev/null
+++ b/itext.tests/itext.sign.tests/itext/signatures/IssuingCertificateRetrieverTest.cs
@@ -0,0 +1,63 @@
+/*
+This file is part of the iText (R) project.
+Copyright (c) 1998-2024 Apryse Group NV
+Authors: Apryse Software.
+
+This program is offered under a commercial and under the AGPL license.
+For commercial licensing, contact us at https://itextpdf.com/sales.  For AGPL licensing, see below.
+
+AGPL licensing:
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+using System;
+using System.Collections.Generic;
+using iText.Commons.Bouncycastle.Cert;
+using iText.Commons.Utils;
+using iText.Signatures.Testutils;
+using iText.Signatures.Validation;
+using iText.Signatures.Validation.Mocks;
+using iText.Test;
+
+namespace iText.Signatures {
+//\cond DO_NOT_DOCUMENT
+    internal class IssuingCertificateRetrieverTest : ExtendedITextTest {
+        private static readonly String CERTS_SRC = iText.Test.TestUtil.GetParentProjectDirectory(NUnit.Framework.TestContext
+            .CurrentContext.TestDirectory) + "/resources/itext/signatures/certs/";
+
+        private static readonly char[] PASSWORD = "testpassphrase".ToCharArray();
+
+        [NUnit.Framework.Test]
+        public virtual void TestResourceRetrieverUsage() {
+            IX509Certificate[] cert = PemFileHelper.ReadFirstChain(CERTS_SRC + "intermediate.pem");
+            IList<Uri> urlsCalled = new List<Uri>();
+            MockResourceRetriever mockRetriever = new MockResourceRetriever();
+            mockRetriever.OnGetInputStreamByUrl((u) => {
+                urlsCalled.Add(u);
+                try {
+                    return FileUtil.GetInputStreamForFile(CERTS_SRC + "root.pem");
+                }
+                catch (System.IO.IOException e) {
+                    throw new Exception("Error reading certificate.", e);
+                }
+            }
+            );
+            ValidatorChainBuilder builder = new ValidatorChainBuilder().WithResourceRetriever(() => mockRetriever);
+            builder.GetCertificateRetriever().RetrieveIssuerCertificate(cert[0]);
+            NUnit.Framework.Assert.AreEqual(1, urlsCalled.Count);
+            NUnit.Framework.Assert.AreEqual("http://test.example.com/example-ca/certs/ca/ca.crt", urlsCalled[0].ToString
+                ());
+        }
+    }
+//\endcond
+}
diff --git a/itext.tests/itext.sign.tests/itext/signatures/testutils/client/TestOcspClientWrapper.cs b/itext.tests/itext.sign.tests/itext/signatures/testutils/client/TestOcspClientWrapper.cs
index e920b505a4..acc7653b8c 100644
--- a/itext.tests/itext.sign.tests/itext/signatures/testutils/client/TestOcspClientWrapper.cs
+++ b/itext.tests/itext.sign.tests/itext/signatures/testutils/client/TestOcspClientWrapper.cs
@@ -29,17 +29,22 @@ You should have received a copy of the GNU Affero General Public License
 using iText.Signatures;
 
 namespace iText.Signatures.Testutils.Client {
-    public class TestOcspClientWrapper : IOcspClient {
+    public class TestOcspClientWrapper : IOcspClient, IOcspClientBouncyCastle {
         private static readonly IBouncyCastleFactory BOUNCY_CASTLE_FACTORY = BouncyCastleFactoryCreator.GetFactory
             ();
 
         private readonly IList<TestOcspClientWrapper.OcspClientCall> calls = new List<TestOcspClientWrapper.OcspClientCall
             >();
 
+        private readonly IList<TestOcspClientWrapper.BasicOCSPCall> basicCalls = new List<TestOcspClientWrapper.BasicOCSPCall
+            >();
+
         private readonly IOcspClient wrappedClient;
 
         private Func<TestOcspClientWrapper.OcspClientCall, byte[]> onGetEncoded;
 
+        private Func<TestOcspClientWrapper.BasicOCSPCall, IBasicOcspResponse> onGetBasicPOcspResponse;
+
         public TestOcspClientWrapper(IOcspClient wrappedClient) {
             this.wrappedClient = wrappedClient;
         }
@@ -70,12 +75,36 @@ public virtual byte[] GetEncoded(IX509Certificate checkCert, IX509Certificate is
             return calls;
         }
 
+        public virtual IList<TestOcspClientWrapper.BasicOCSPCall> GetBasicResponceCalls() {
+            return basicCalls;
+        }
+
         public virtual iText.Signatures.Testutils.Client.TestOcspClientWrapper OnGetEncodedDo(Func<TestOcspClientWrapper.OcspClientCall
             , byte[]> callBack) {
             onGetEncoded = callBack;
             return this;
         }
 
+        public virtual IBasicOcspResponse GetBasicOCSPResp(IX509Certificate checkCert, IX509Certificate issuerCert
+            , String url) {
+            TestOcspClientWrapper.BasicOCSPCall call = new TestOcspClientWrapper.BasicOCSPCall(checkCert, issuerCert, 
+                url);
+            basicCalls.Add(call);
+            if (onGetBasicPOcspResponse != null) {
+                return onGetBasicPOcspResponse.Invoke(call);
+            }
+            if (wrappedClient is IOcspClientBouncyCastle) {
+                return ((IOcspClientBouncyCastle)wrappedClient).GetBasicOCSPResp(checkCert, issuerCert, url);
+            }
+            throw new Exception("TestOcspClientWrapper for IOcspClientBouncyCastle was expected here.");
+        }
+
+        public virtual iText.Signatures.Testutils.Client.TestOcspClientWrapper OnGetBasicOCSPRespDo(Func<TestOcspClientWrapper.BasicOCSPCall
+            , IBasicOcspResponse> callback) {
+            onGetBasicPOcspResponse = callback;
+            return this;
+        }
+
         public class OcspClientCall {
             public readonly IX509Certificate checkCert;
 
@@ -95,5 +124,19 @@ public virtual void SetResponce(IBasicOcspResponse basicOCSPResp) {
                 response = basicOCSPResp;
             }
         }
+
+        public class BasicOCSPCall {
+            public readonly IX509Certificate checkCert;
+
+            public readonly IX509Certificate issuerCert;
+
+            public readonly String url;
+
+            public BasicOCSPCall(IX509Certificate checkCert, IX509Certificate issuerCert, String url) {
+                this.checkCert = checkCert;
+                this.issuerCert = issuerCert;
+                this.url = url;
+            }
+        }
     }
 }
diff --git a/itext.tests/itext.sign.tests/itext/signatures/validation/RevocationDataValidatorTest.cs b/itext.tests/itext.sign.tests/itext/signatures/validation/RevocationDataValidatorTest.cs
index a497b715b9..5ea1883c13 100644
--- a/itext.tests/itext.sign.tests/itext/signatures/validation/RevocationDataValidatorTest.cs
+++ b/itext.tests/itext.sign.tests/itext/signatures/validation/RevocationDataValidatorTest.cs
@@ -411,7 +411,7 @@ public virtual void CrlEncodingErrorTest() {
             parameters.SetFreshness(ValidatorContexts.All(), CertificateSources.All(), TimeBasedContexts.All(), TimeSpan.FromDays
                 (2));
             RevocationDataValidator validator = validatorChainBuilder.BuildRevocationDataValidator();
-            validator.AddCrlClient(new _ICrlClient_557(crl)).Validate(report, baseContext, checkCert, TimeTestUtil.TEST_DATE_TIME
+            validator.AddCrlClient(new _ICrlClient_561(crl)).Validate(report, baseContext, checkCert, TimeTestUtil.TEST_DATE_TIME
                 );
             AssertValidationReport.AssertThat(report, (a) => a.HasStatus(ValidationReport.ValidationResult.INDETERMINATE
                 ).HasLogItem((la) => la.WithCheckName(RevocationDataValidator.REVOCATION_DATA_CHECK).WithMessage(MessageFormatUtil
@@ -420,8 +420,8 @@ public virtual void CrlEncodingErrorTest() {
                 )));
         }
 
-        private sealed class _ICrlClient_557 : ICrlClient {
-            public _ICrlClient_557(byte[] crl) {
+        private sealed class _ICrlClient_561 : ICrlClient {
+            public _ICrlClient_561(byte[] crl) {
                 this.crl = crl;
             }
 
@@ -519,7 +519,7 @@ public virtual void ResponsesFromValidationClientArePassedTest() {
             mockCrlValidator.OnCallDo((c) => NUnit.Framework.Assert.AreEqual(crlGeneration, c.responseGenerationDate));
             ValidationReport report = new ValidationReport();
             RevocationDataValidator validator = validatorChainBuilder.GetRevocationDataValidator();
-            ValidationOcspClient ocspClient = new _ValidationOcspClient_676();
+            ValidationOcspClient ocspClient = new _ValidationOcspClient_680();
             TestOcspResponseBuilder ocspBuilder = new TestOcspResponseBuilder(responderCert, ocspRespPrivateKey);
             byte[] ocspResponseBytes = new TestOcspClient().AddBuilderForCertIssuer(caCert, ocspBuilder).GetEncoded(checkCert
                 , caCert, null);
@@ -527,7 +527,7 @@ public virtual void ResponsesFromValidationClientArePassedTest() {
                 ));
             ocspClient.AddResponse(basicOCSPResp, ocspGeneration, TimeBasedContext.HISTORICAL);
             validator.AddOcspClient(ocspClient);
-            ValidationCrlClient crlClient = new _ValidationCrlClient_691();
+            ValidationCrlClient crlClient = new _ValidationCrlClient_695();
             TestCrlBuilder crlBuilder = new TestCrlBuilder(caCert, caPrivateKey, checkDate);
             byte[] crlResponseBytes = new List<byte[]>(new TestCrlClient().AddBuilderForCertIssuer(crlBuilder).GetEncoded
                 (checkCert, null))[0];
@@ -537,8 +537,8 @@ public virtual void ResponsesFromValidationClientArePassedTest() {
             validator.Validate(report, baseContext, checkCert, checkDate);
         }
 
-        private sealed class _ValidationOcspClient_676 : ValidationOcspClient {
-            public _ValidationOcspClient_676() {
+        private sealed class _ValidationOcspClient_680 : ValidationOcspClient {
+            public _ValidationOcspClient_680() {
             }
 
             public override byte[] GetEncoded(IX509Certificate checkCert, IX509Certificate issuerCert, String url) {
@@ -547,8 +547,8 @@ public override byte[] GetEncoded(IX509Certificate checkCert, IX509Certificate i
             }
         }
 
-        private sealed class _ValidationCrlClient_691 : ValidationCrlClient {
-            public _ValidationCrlClient_691() {
+        private sealed class _ValidationCrlClient_695 : ValidationCrlClient {
+            public _ValidationCrlClient_695() {
             }
 
             public override ICollection<byte[]> GetEncoded(IX509Certificate checkCert, String url) {
@@ -614,18 +614,18 @@ public virtual void TimeBasedContextProperlySetOnlineClientsTest() {
             RevocationDataValidator validator = validatorChainBuilder.GetRevocationDataValidator();
             TestOcspResponseBuilder ocspBuilder = new TestOcspResponseBuilder(responderCert, ocspRespPrivateKey);
             TestOcspClient testOcspClient = new TestOcspClient().AddBuilderForCertIssuer(caCert, ocspBuilder);
-            OcspClientBouncyCastle ocspClient = new _OcspClientBouncyCastle_770(testOcspClient);
+            OcspClientBouncyCastle ocspClient = new _OcspClientBouncyCastle_774(testOcspClient);
             validator.AddOcspClient(ocspClient);
             TestCrlBuilder crlBuilder = new TestCrlBuilder(caCert, caPrivateKey, checkDate);
             TestCrlClient testCrlClient = new TestCrlClient().AddBuilderForCertIssuer(crlBuilder);
-            CrlClientOnline crlClient = new _CrlClientOnline_780(testCrlClient);
+            CrlClientOnline crlClient = new _CrlClientOnline_784(testCrlClient);
             validator.AddCrlClient(crlClient);
             validator.Validate(report, baseContext.SetTimeBasedContext(TimeBasedContext.HISTORICAL), checkCert, checkDate
                 );
         }
 
-        private sealed class _OcspClientBouncyCastle_770 : OcspClientBouncyCastle {
-            public _OcspClientBouncyCastle_770(TestOcspClient testOcspClient) {
+        private sealed class _OcspClientBouncyCastle_774 : OcspClientBouncyCastle {
+            public _OcspClientBouncyCastle_774(TestOcspClient testOcspClient) {
                 this.testOcspClient = testOcspClient;
             }
 
@@ -636,8 +636,8 @@ public override byte[] GetEncoded(IX509Certificate checkCert, IX509Certificate r
             private readonly TestOcspClient testOcspClient;
         }
 
-        private sealed class _CrlClientOnline_780 : CrlClientOnline {
-            public _CrlClientOnline_780(TestCrlClient testCrlClient) {
+        private sealed class _CrlClientOnline_784 : CrlClientOnline {
+            public _CrlClientOnline_784(TestCrlClient testCrlClient) {
                 this.testCrlClient = testCrlClient;
             }
 
@@ -802,5 +802,40 @@ public virtual void CrlClientGetEncodedFailureTest() {
                 ).HasLogItem((l) => l.WithMessage(RevocationDataValidator.CRL_CLIENT_FAILURE, (p) => crlClient.ToString
                 ())));
         }
+
+        [NUnit.Framework.Test]
+        public virtual void TestCrlClientInjection() {
+            TestCrlClient testCrlClient = new TestCrlClient();
+            TestCrlClientWrapper mockCrlClient = new TestCrlClientWrapper(testCrlClient);
+            validatorChainBuilder.WithCrlClient(() => mockCrlClient);
+            testCrlClient.AddBuilderForCertIssuer(caCert, caPrivateKey);
+            ValidationReport report = new ValidationReport();
+            ValidationContext context = new ValidationContext(ValidatorContext.CERTIFICATE_CHAIN_VALIDATOR, CertificateSource
+                .SIGNER_CERT, TimeBasedContext.HISTORICAL);
+            validatorChainBuilder.BuildRevocationDataValidator().Validate(report, context, checkCert, TimeTestUtil.TEST_DATE_TIME
+                );
+            NUnit.Framework.Assert.AreEqual(1, mockCrlClient.GetCalls().Count);
+        }
+
+        [NUnit.Framework.Test]
+        public virtual void TestOcspClientInjection() {
+            DateTime checkDate = TimeTestUtil.TEST_DATE_TIME;
+            TestOcspResponseBuilder builder = new TestOcspResponseBuilder(responderCert, ocspRespPrivateKey);
+            builder.SetProducedAt(checkDate.AddDays(5));
+            builder.SetThisUpdate(DateTimeUtil.GetCalendar(checkDate.AddDays(5)));
+            builder.SetNextUpdate(DateTimeUtil.GetCalendar(checkDate.AddDays(10)));
+            TestOcspClientWrapper mockOcspClient = new TestOcspClientWrapper(new TestOcspClient().AddBuilderForCertIssuer
+                (caCert, builder));
+            validatorChainBuilder.WithOcspClient(() => mockOcspClient);
+            mockParameters.AddRevocationOnlineFetchingResponse(SignatureValidationProperties.OnlineFetching.ALWAYS_FETCH
+                );
+            certificateRetriever.AddKnownCertificates(JavaUtil.ArraysAsList(caCert, trustedOcspResponderCert));
+            ValidationReport report = new ValidationReport();
+            ValidationContext context = new ValidationContext(ValidatorContext.CERTIFICATE_CHAIN_VALIDATOR, CertificateSource
+                .SIGNER_CERT, TimeBasedContext.HISTORICAL);
+            validatorChainBuilder.BuildRevocationDataValidator().Validate(report, context, checkCert, TimeTestUtil.TEST_DATE_TIME
+                );
+            NUnit.Framework.Assert.AreEqual(2, mockOcspClient.GetBasicResponceCalls().Count);
+        }
     }
 }
diff --git a/itext.tests/itext.sign.tests/itext/signatures/validation/mocks/MockResourceRetriever.cs b/itext.tests/itext.sign.tests/itext/signatures/validation/mocks/MockResourceRetriever.cs
new file mode 100644
index 0000000000..7886ce106e
--- /dev/null
+++ b/itext.tests/itext.sign.tests/itext/signatures/validation/mocks/MockResourceRetriever.cs
@@ -0,0 +1,51 @@
+/*
+This file is part of the iText (R) project.
+Copyright (c) 1998-2024 Apryse Group NV
+Authors: Apryse Software.
+
+This program is offered under a commercial and under the AGPL license.
+For commercial licensing, contact us at https://itextpdf.com/sales.  For AGPL licensing, see below.
+
+AGPL licensing:
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+using System;
+using System.IO;
+using iText.StyledXmlParser.Resolver.Resource;
+
+namespace iText.Signatures.Validation.Mocks {
+    public class MockResourceRetriever : IResourceRetriever {
+        private Func<Uri, byte[]> getByteArrayByUrlHandler = (u) => null;
+
+        private Func<Uri, Stream> getInputStreamByUrlHandler = (u) => null;
+
+        public virtual Stream GetInputStreamByUrl(Uri url) {
+            return getInputStreamByUrlHandler.Invoke(url);
+        }
+
+        public virtual byte[] GetByteArrayByUrl(Uri url) {
+            return getByteArrayByUrlHandler.Invoke(url);
+        }
+
+        public virtual MockResourceRetriever OnGetInputStreamByUrl(Func<Uri, Stream> handler) {
+            getInputStreamByUrlHandler = handler;
+            return this;
+        }
+
+        public virtual MockResourceRetriever OnGetByteArrayByUrl(Func<Uri, byte[]> handler) {
+            getByteArrayByUrlHandler = handler;
+            return this;
+        }
+    }
+}
diff --git a/itext.tests/itext.svg.tests/itext/svg/css/AttributesRelativeUnitTest.cs b/itext.tests/itext.svg.tests/itext/svg/css/AttributesRelativeUnitTest.cs
index 22a8bb17d9..0b8e35711d 100644
--- a/itext.tests/itext.svg.tests/itext/svg/css/AttributesRelativeUnitTest.cs
+++ b/itext.tests/itext.svg.tests/itext/svg/css/AttributesRelativeUnitTest.cs
@@ -21,6 +21,8 @@ You should have received a copy of the GNU Affero General Public License
 along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 using System;
+using iText.Kernel.Geom;
+using iText.Svg.Processors.Impl;
 using iText.Svg.Renderers;
 using iText.Test;
 
@@ -66,5 +68,140 @@ public virtual void ImageAttributesExUnitsTest() {
         public virtual void ImageAttributesPercentUnitsTest() {
             ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "imageAttributesPercentUnits");
         }
+
+        //-------------- Nested svg
+        [NUnit.Framework.Test]
+        public virtual void NestedSvgWidthPercentTest() {
+            ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "nestedSvgWidthPercentTest");
+        }
+
+        [NUnit.Framework.Test]
+        public virtual void NestedSvgXPercentTest() {
+            ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "nestedSvgXPercentTest");
+        }
+
+        [NUnit.Framework.Test]
+        public virtual void NestedSvgHeightPercentTest() {
+            ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "nestedSvgHeightPercentTest");
+        }
+
+        [NUnit.Framework.Test]
+        public virtual void NestedSvgYPercentTest() {
+            ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "nestedSvgYPercentTest");
+        }
+
+        [NUnit.Framework.Test]
+        public virtual void NestedSvgWidthEmTest() {
+            ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "nestedSvgWidthEmTest");
+        }
+
+        [NUnit.Framework.Test]
+        public virtual void NestedSvgAllPercentTest() {
+            ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "nestedSvgAllPercentTest");
+        }
+
+        //-------------- Top level svg
+        [NUnit.Framework.Test]
+        public virtual void SvgWidthPercentTest() {
+            ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "svgWidthPercentTest");
+        }
+
+        [NUnit.Framework.Test]
+        public virtual void SvgViewboxWidthPercentTest() {
+            ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "svgViewboxWidthPercentTest");
+        }
+
+        [NUnit.Framework.Test]
+        public virtual void SvgHeightPercentTest() {
+            ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "svgHeightPercentTest");
+        }
+
+        [NUnit.Framework.Test]
+        public virtual void SvgWidthAndHeightEmAndRemTest() {
+            ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "svgWidthAndHeightEmAndRemTest");
+        }
+
+        //-------------- use
+        [NUnit.Framework.Test]
+        public virtual void UseXPercentTest() {
+            ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "useXPercentTest");
+        }
+
+        [NUnit.Framework.Test]
+        public virtual void UseYPercentTest() {
+            ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "useYPercentTest");
+        }
+
+        [NUnit.Framework.Test]
+        public virtual void UseXAndYEmAndRemTest() {
+            ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "useXAndYEmAndRemTest");
+        }
+
+        [NUnit.Framework.Test]
+        public virtual void UseWidthPercentTest() {
+            // TODO DEVSIX-4566 Processing of width&height attributes in use tag are not currently supported
+            ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "useWidthPercentTest");
+        }
+
+        //-------------- symbol
+        [NUnit.Framework.Test]
+        public virtual void SymbolXPercentTest() {
+            ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "symbolXPercentTest");
+        }
+
+        [NUnit.Framework.Test]
+        public virtual void SymbolYPercentTest() {
+            ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "symbolYPercentTest");
+        }
+
+        [NUnit.Framework.Test]
+        public virtual void SymbolXAndYEmAndRemTest() {
+            ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "symbolXAndYEmAndRemTest");
+        }
+
+        [NUnit.Framework.Test]
+        public virtual void SymbolWidthAndHeightPercentTest() {
+            ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "symbolWidthAndHeightPercentTest");
+        }
+
+        [NUnit.Framework.Test]
+        public virtual void SymbolWidthAndHeightEmAndRemTest() {
+            ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "symbolWidthAndHeightEmAndRemTest");
+        }
+
+        //-------------- misc
+        [NUnit.Framework.Test]
+        public virtual void LinePercentTest() {
+            ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "linePercentTest");
+        }
+
+        [NUnit.Framework.Test]
+        public virtual void DiffViewBoxAndPortPercent1Test() {
+            ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "diffViewBoxAndPortPercent1Test");
+        }
+
+        [NUnit.Framework.Test]
+        public virtual void DiffViewBoxAndPortPercent2Test() {
+            ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "diffViewBoxAndPortPercent2Test");
+        }
+
+        [NUnit.Framework.Test]
+        public virtual void NoViewBoxAndViewPortPercentTest() {
+            ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "noViewBoxAndViewPortPercentTest");
+        }
+
+        [NUnit.Framework.Test]
+        public virtual void NoViewBoxPercentTest() {
+            ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "noViewBoxPercentTest");
+        }
+
+        [NUnit.Framework.Test]
+        public virtual void ViewportFromConverterPropertiesTest() {
+            SvgConverterProperties properties = new SvgConverterProperties();
+            properties.SetCustomViewport(new Rectangle(500, 500));
+            // It is expected that the result is different with browser. In
+            // browsers the result should be bigger but with the same proportions
+            ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "viewportFromConverterPropertiesTest", properties);
+        }
     }
 }
diff --git a/itext.tests/itext.svg.tests/itext/svg/css/SvgStyleResolverIntegrationTest.cs b/itext.tests/itext.svg.tests/itext/svg/css/SvgStyleResolverIntegrationTest.cs
index 0b77ae8895..a4bcd9b9ae 100644
--- a/itext.tests/itext.svg.tests/itext/svg/css/SvgStyleResolverIntegrationTest.cs
+++ b/itext.tests/itext.svg.tests/itext/svg/css/SvgStyleResolverIntegrationTest.cs
@@ -132,7 +132,6 @@ public virtual void ValidLocalFontTest() {
 
         [NUnit.Framework.Test]
         public virtual void FontWeightTest() {
-            //TODO DEVSIX-2079: change compare file after fix
             ConvertAndCompare(sourceFolder, destinationFolder, "fontWeightTest");
         }
 
diff --git a/itext.tests/itext.svg.tests/itext/svg/renderers/RelativePositionsTest.cs b/itext.tests/itext.svg.tests/itext/svg/renderers/RelativePositionsTest.cs
index c3fe8dad8e..7ef0da018b 100644
--- a/itext.tests/itext.svg.tests/itext/svg/renderers/RelativePositionsTest.cs
+++ b/itext.tests/itext.svg.tests/itext/svg/renderers/RelativePositionsTest.cs
@@ -43,7 +43,6 @@ public virtual void RelativePositionsBasic1Test() {
             ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "relativePositionsBasic");
         }
 
-        //TODO DEVSIX-5740: Update cmp file after supporting
         [NUnit.Framework.Test]
         public virtual void RelativePositionsBasic2Test() {
             ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "relativePositionsBasic2");
diff --git a/itext.tests/itext.svg.tests/itext/svg/renderers/SvgImageRendererTest.cs b/itext.tests/itext.svg.tests/itext/svg/renderers/SvgImageRendererTest.cs
index bf13351754..357417f446 100644
--- a/itext.tests/itext.svg.tests/itext/svg/renderers/SvgImageRendererTest.cs
+++ b/itext.tests/itext.svg.tests/itext/svg/renderers/SvgImageRendererTest.cs
@@ -59,7 +59,7 @@ public virtual void SvgWithSvgTest() {
                 INode parsedSvg = SvgConverter.Parse(FileUtil.GetInputStreamForFile(svgFileName));
                 ISvgProcessorResult result = new DefaultSvgProcessor().Process(parsedSvg, null);
                 ISvgNodeRenderer topSvgRenderer = result.GetRootRenderer();
-                Rectangle wh = SvgCssUtils.ExtractWidthAndHeight(topSvgRenderer, 0.0F, 0.0F);
+                Rectangle wh = SvgCssUtils.ExtractWidthAndHeight(topSvgRenderer, 0.0F, new SvgDrawContext(null, null));
                 SvgImageXObject svgImageXObject = new SvgImageXObject(wh, result, new ResourceResolver(SOURCE_FOLDER));
                 SvgImage svgImage = new SvgImage(svgImageXObject);
                 document.Add(svgImage);
@@ -80,7 +80,7 @@ public virtual void CustomSvgImageTest() {
                 ISvgProcessorResult result = new DefaultSvgProcessor().Process(parsedSvg, new SvgConverterProperties().SetBaseUri
                     (svgFileName));
                 ISvgNodeRenderer topSvgRenderer = result.GetRootRenderer();
-                Rectangle wh = SvgCssUtils.ExtractWidthAndHeight(topSvgRenderer, 0.0F, 0.0F);
+                Rectangle wh = SvgCssUtils.ExtractWidthAndHeight(topSvgRenderer, 0.0F, new SvgDrawContext(null, null));
                 SvgImageXObject svgImageXObject = new SvgImageXObject(wh, result, new ResourceResolver(SOURCE_FOLDER));
                 SvgImage svgImage = new SvgImage(svgImageXObject);
                 document.Add(svgImage);
@@ -101,7 +101,7 @@ public virtual void NoSpecifiedWidthHeightImageTest() {
                 ISvgProcessorResult result = new DefaultSvgProcessor().Process(parsedSvg, new SvgConverterProperties().SetBaseUri
                     (svgFileName));
                 ISvgNodeRenderer topSvgRenderer = result.GetRootRenderer();
-                Rectangle wh = SvgCssUtils.ExtractWidthAndHeight(topSvgRenderer, 0.0F, 0.0F);
+                Rectangle wh = SvgCssUtils.ExtractWidthAndHeight(topSvgRenderer, 0.0F, new SvgDrawContext(null, null));
                 document.Add(new SvgImage(new SvgImageXObject(wh, result, new ResourceResolver(SOURCE_FOLDER))));
             }
             NUnit.Framework.Assert.IsNull(new CompareTool().CompareByContent(outFileName, cmpFileName, DESTINATION_FOLDER
diff --git a/itext.tests/itext.svg.tests/itext/svg/renderers/SvgIntegrationTest.cs b/itext.tests/itext.svg.tests/itext/svg/renderers/SvgIntegrationTest.cs
index 2214b3e76b..726ee74da1 100644
--- a/itext.tests/itext.svg.tests/itext/svg/renderers/SvgIntegrationTest.cs
+++ b/itext.tests/itext.svg.tests/itext/svg/renderers/SvgIntegrationTest.cs
@@ -43,14 +43,14 @@ public virtual void Convert(Stream svg, Stream pdfOutputStream) {
         }
 
         public virtual void Convert(String svg, String output) {
-            Convert(svg, output, PageSize.DEFAULT);
+            Convert(svg, output, PageSize.DEFAULT, new SvgConverterProperties());
         }
 
-        public virtual void Convert(String svg, String output, PageSize size) {
+        public virtual void Convert(String svg, String output, PageSize size, SvgConverterProperties properties) {
             using (PdfDocument doc = new PdfDocument(new PdfWriter(output, new WriterProperties().SetCompressionLevel(
                 0)))) {
                 doc.AddNewPage(size);
-                ISvgConverterProperties properties = new SvgConverterProperties().SetBaseUri(svg);
+                properties.SetBaseUri(svg);
                 SvgConverter.DrawOnDocument(FileUtil.GetInputStreamForFile(svg), doc, 1, properties);
             }
         }
@@ -99,8 +99,19 @@ public virtual void ConvertAndCompare(String src, String dest, String fileName)
             ConvertAndCompare(src, dest, fileName, PageSize.DEFAULT);
         }
 
+        public virtual void ConvertAndCompare(String src, String dest, String fileName, SvgConverterProperties properties
+            ) {
+            ConvertAndCompare(src, dest, fileName, PageSize.DEFAULT, properties);
+        }
+
         public virtual void ConvertAndCompare(String src, String dest, String fileName, PageSize size) {
-            Convert(src + fileName + ".svg", dest + fileName + ".pdf", size);
+            Convert(src + fileName + ".svg", dest + fileName + ".pdf", size, new SvgConverterProperties());
+            Compare(fileName, src, dest);
+        }
+
+        public virtual void ConvertAndCompare(String src, String dest, String fileName, PageSize size, SvgConverterProperties
+             properties) {
+            Convert(src + fileName + ".svg", dest + fileName + ".pdf", size, properties);
             Compare(fileName, src, dest);
         }
 
diff --git a/itext.tests/itext.svg.tests/itext/svg/renderers/impl/SimpleSvgTagSvgNodeRendererIntegrationTest.cs b/itext.tests/itext.svg.tests/itext/svg/renderers/impl/SimpleSvgTagSvgNodeRendererIntegrationTest.cs
index e42b88a064..7c0e2b8ef2 100644
--- a/itext.tests/itext.svg.tests/itext/svg/renderers/impl/SimpleSvgTagSvgNodeRendererIntegrationTest.cs
+++ b/itext.tests/itext.svg.tests/itext/svg/renderers/impl/SimpleSvgTagSvgNodeRendererIntegrationTest.cs
@@ -23,10 +23,8 @@ You should have received a copy of the GNU Affero General Public License
 using System;
 using iText.Commons.Utils;
 using iText.StyledXmlParser.Exceptions;
-using iText.Svg.Logs;
 using iText.Svg.Renderers;
 using iText.Test;
-using iText.Test.Attributes;
 
 namespace iText.Svg.Renderers.Impl {
     [NUnit.Framework.Category("IntegrationTest")]
@@ -48,23 +46,16 @@ public virtual void EverythingPresentAndValidTest() {
         }
 
         [NUnit.Framework.Test]
-        //TODO: change cmp file after DEVSIX-3123 fixed
-        [LogMessage(SvgLogMessageConstant.MISSING_HEIGHT)]
         public virtual void AbsentHeight() {
             ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "absentHeight");
         }
 
         [NUnit.Framework.Test]
-        //TODO: change cmp file after DEVSIX-3123 fixed
-        [LogMessage(SvgLogMessageConstant.MISSING_WIDTH)]
         public virtual void AbsentWidth() {
             ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "absentWidth");
         }
 
         [NUnit.Framework.Test]
-        //TODO: change cmp file after DEVSIX-3123 fixed
-        [LogMessage(SvgLogMessageConstant.MISSING_WIDTH)]
-        [LogMessage(SvgLogMessageConstant.MISSING_HEIGHT)]
         public virtual void AbsentWidthAndHeight() {
             ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "absentWidthAndHeight");
         }
@@ -100,14 +91,12 @@ public virtual void InvalidWidth() {
 
         [NUnit.Framework.Test]
         public virtual void InvalidX() {
-            NUnit.Framework.Assert.Catch(typeof(StyledXMLParserException), () => ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER
-                , "invalidX"));
+            ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "invalidX");
         }
 
         [NUnit.Framework.Test]
         public virtual void InvalidY() {
-            NUnit.Framework.Assert.Catch(typeof(StyledXMLParserException), () => ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER
-                , "invalidY"));
+            ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "invalidY");
         }
 
         [NUnit.Framework.Test]
diff --git a/itext.tests/itext.svg.tests/itext/svg/renderers/impl/SvgTagSvgNodeRendererUnitTest.cs b/itext.tests/itext.svg.tests/itext/svg/renderers/impl/SvgTagSvgNodeRendererUnitTest.cs
index 0d6fe8a7a6..66954bd0fa 100644
--- a/itext.tests/itext.svg.tests/itext/svg/renderers/impl/SvgTagSvgNodeRendererUnitTest.cs
+++ b/itext.tests/itext.svg.tests/itext/svg/renderers/impl/SvgTagSvgNodeRendererUnitTest.cs
@@ -20,6 +20,8 @@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 You should have received a copy of the GNU Affero General Public License
 along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
+using System;
+using System.Collections.Generic;
 using System.IO;
 using iText.Kernel.Geom;
 using iText.Kernel.Pdf;
@@ -43,6 +45,7 @@ public virtual void CalculateNestedViewportSameAsParentTest() {
             context.PushCanvas(canvas);
             context.AddViewPort(expected);
             SvgTagSvgNodeRenderer parent = new SvgTagSvgNodeRenderer();
+            parent.SetAttributesAndStyles(new Dictionary<String, String>());
             SvgTagSvgNodeRenderer renderer = new SvgTagSvgNodeRenderer();
             renderer.SetParent(parent);
             Rectangle actual = renderer.CalculateViewPort(context);
diff --git a/itext.tests/itext.svg.tests/itext/svg/renderers/impl/SymbolTest.cs b/itext.tests/itext.svg.tests/itext/svg/renderers/impl/SymbolTest.cs
index d0c4af3a05..7f0a1a38fb 100644
--- a/itext.tests/itext.svg.tests/itext/svg/renderers/impl/SymbolTest.cs
+++ b/itext.tests/itext.svg.tests/itext/svg/renderers/impl/SymbolTest.cs
@@ -25,7 +25,6 @@ You should have received a copy of the GNU Affero General Public License
 using iText.Svg.Processors.Impl;
 using iText.Svg.Renderers;
 using iText.Test;
-using iText.Test.Attributes;
 
 namespace iText.Svg.Renderers.Impl {
     [NUnit.Framework.Category("IntegrationTest")]
@@ -64,23 +63,22 @@ public virtual void HeightPxAttrTest() {
         }
 
         [NUnit.Framework.Test]
-        [LogMessage(iText.StyledXmlParser.Logs.StyledXmlParserLogMessageConstant.UNKNOWN_ABSOLUTE_METRIC_LENGTH_PARSED
-            )]
         public virtual void HeightPercentsAttrTest() {
-            // TODO DEVSIX-4388 The handling of width and height attributes with percentages is not currently supported
             ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "heightPercentsAttrTest");
         }
 
+        [NUnit.Framework.Test]
+        public virtual void HeightEmTest() {
+            ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "heightEmTest");
+        }
+
         [NUnit.Framework.Test]
         public virtual void WidthPxAttrTest() {
             ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "widthPxAttrTest");
         }
 
         [NUnit.Framework.Test]
-        [LogMessage(iText.StyledXmlParser.Logs.StyledXmlParserLogMessageConstant.UNKNOWN_ABSOLUTE_METRIC_LENGTH_PARSED
-            )]
         public virtual void WidthPercentsAttrTest() {
-            // TODO DEVSIX-4388 The handling of width and height attributes with percentages is not currently supported
             ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "widthPercentsAttrTest");
         }
 
@@ -90,15 +88,13 @@ public virtual void WidthHeightAttrPxTest() {
         }
 
         [NUnit.Framework.Test]
-        [LogMessage(iText.StyledXmlParser.Logs.StyledXmlParserLogMessageConstant.UNKNOWN_ABSOLUTE_METRIC_LENGTH_PARSED
-            , Count = 2)]
         public virtual void WidthHeightAttrPercentsPxTest() {
-            // TODO DEVSIX-4388 The handling of width and height attributes with percentages is not currently supported
             ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "widthHeightAttrPercentsPxTest");
         }
 
         [NUnit.Framework.Test]
         public virtual void PreserveAspectRatioViewBoxTest() {
+            // TODO DEVSIX-3537 Processing of preserveAspectRatio attribute with offsets x and y is not currently supported
             ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "preserveAspectRatioViewBoxTest");
         }
 
@@ -169,29 +165,20 @@ public virtual void UseHeightWidthAllUnitsTest() {
         }
 
         [NUnit.Framework.Test]
-        [LogMessage(iText.StyledXmlParser.Logs.StyledXmlParserLogMessageConstant.UNKNOWN_ABSOLUTE_METRIC_LENGTH_PARSED
-            )]
         public virtual void UseSymbolHeightWidthAllUnitsTest() {
-            // TODO DEVSIX-4388 The handling of width and height attributes with percentages is not currently supported
             // TODO DEVSIX-4566 Processing of width&height attributes in use tag are not currently supported
             ConvertAndCompareSinglePage(SOURCE_FOLDER, DESTINATION_FOLDER, "useSymbolHeightWidthAllUnitsTest", properties
                 );
         }
 
         [NUnit.Framework.Test]
-        [LogMessage(iText.StyledXmlParser.Logs.StyledXmlParserLogMessageConstant.UNKNOWN_ABSOLUTE_METRIC_LENGTH_PARSED
-            , Count = 2)]
         public virtual void UseSymbolXYContrudictionAllUnitsTest() {
-            // TODO DEVSIX-4388 The handling of x and y attributes with percentages is not currently supported
             ConvertAndCompareSinglePage(SOURCE_FOLDER, DESTINATION_FOLDER, "useSymbolXYContrudictionAllUnitsTest", properties
                 );
         }
 
         [NUnit.Framework.Test]
-        [LogMessage(iText.StyledXmlParser.Logs.StyledXmlParserLogMessageConstant.UNKNOWN_ABSOLUTE_METRIC_LENGTH_PARSED
-            , Count = 4)]
         public virtual void UseSymbolCoordinatesContrudictionTest() {
-            // TODO DEVSIX-2654 Percent values are not correctly processed
             ConvertAndCompareSinglePage(SOURCE_FOLDER, DESTINATION_FOLDER, "useSymbolCoordinatesContrudiction", properties
                 );
         }
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Binary files /dev/null and b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/cmp_symbolYPercentTest.pdf differ
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/cmp_useWidthPercentTest.pdf b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/cmp_useWidthPercentTest.pdf
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Binary files /dev/null and b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/cmp_useWidthPercentTest.pdf differ
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/cmp_useXAndYEmAndRemTest.pdf b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/cmp_useXAndYEmAndRemTest.pdf
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Binary files /dev/null and b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/cmp_useXAndYEmAndRemTest.pdf differ
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Binary files /dev/null and b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/cmp_useXPercentTest.pdf differ
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index 0000000000..7ab3460847
Binary files /dev/null and b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/cmp_useYPercentTest.pdf differ
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/cmp_viewportFromConverterPropertiesTest.pdf b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/cmp_viewportFromConverterPropertiesTest.pdf
new file mode 100644
index 0000000000..c255769b3a
Binary files /dev/null and b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/cmp_viewportFromConverterPropertiesTest.pdf differ
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/diffViewBoxAndPortPercent1Test.svg b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/diffViewBoxAndPortPercent1Test.svg
new file mode 100644
index 0000000000..6012965182
--- /dev/null
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/diffViewBoxAndPortPercent1Test.svg
@@ -0,0 +1,12 @@
+<svg viewBox="0 0 220 100" width="400" height="400" xmlns="http://www.w3.org/2000/svg">
+    <!--    rectangle with absolute values-->
+    <rect x="0" y="0" width="100px" height="100px" fill="none" stroke="red" stroke-width="2"/>
+
+    <line x1="0" y1="9" x2="200" y2="9" stroke="blue" />
+    <!--    rectangle with relative values-->
+    <rect x="3%" y="9%" width="40%" height="30%"/>
+    <line x1="0" y1="39" x2="200" y2="39" stroke="blue" />
+
+    <line x1="0" y1="50%" x2="100%" y2="50%" stroke="green" />
+    <line x1="50%" y1="0" x2="50%" y2="100%" stroke="green" />
+</svg>
\ No newline at end of file
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/diffViewBoxAndPortPercent2Test.svg b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/diffViewBoxAndPortPercent2Test.svg
new file mode 100644
index 0000000000..31c69793c3
--- /dev/null
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/diffViewBoxAndPortPercent2Test.svg
@@ -0,0 +1,12 @@
+<svg viewBox="0 0 100 220" width="400" height="400" xmlns="http://www.w3.org/2000/svg">
+    <!--    rectangle with absolute values-->
+    <rect x="0" y="0" width="100px" height="100px" fill="none" stroke="red" stroke-width="2"/>
+
+    <line x1="0" y1="22" x2="200" y2="22" stroke="blue" />
+    <!--    rectangle with relative values-->
+    <rect x="3%" y="10%" width="40%" height="30%"/>
+    <line x1="0" y1="88" x2="200" y2="88" stroke="blue" />
+
+    <line x1="0" y1="50%" x2="100%" y2="50%" stroke="green" />
+    <line x1="50%" y1="0" x2="50%" y2="100%" stroke="green" />
+</svg>
\ No newline at end of file
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/linePercentTest.svg b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/linePercentTest.svg
new file mode 100644
index 0000000000..0bfd9583c3
--- /dev/null
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/linePercentTest.svg
@@ -0,0 +1,7 @@
+<svg viewBox="0 0 400 400" xmlns="http://www.w3.org/2000/svg">
+  <line x1="100" y1="0" x2="100" y2="300" stroke="black" />
+  <svg viewBox="0 0 10 10" x="25%" width="100" height="100">
+    <circle cx="5" cy="5" r="5" fill="grey" />
+    <line x1="0" y1="100%" x2="100%" y2="10" stroke="green" />
+  </svg>
+</svg>
\ No newline at end of file
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/nestedSvgAllPercentTest.svg b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/nestedSvgAllPercentTest.svg
new file mode 100644
index 0000000000..01523b19a9
--- /dev/null
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/nestedSvgAllPercentTest.svg
@@ -0,0 +1,11 @@
+<svg viewBox="0 0 400 400" xmlns="http://www.w3.org/2000/svg">
+  <line x1="40" y1="0" x2="40" y2="400" stroke="black" />
+  <line x1="0" y1="240" x2="400" y2="240" stroke="black" />
+  
+  <!-- scaling: viewbox is square so minimal length from X and Y axis is taken, in our case it is width=20% -->
+  <svg viewBox="0 0 10 10" x="10%" y="20%" width="20%" height="100%">
+    <line x1="0" y1="0" x2="10" y2="10" stroke="black" />
+    <line x1="0" y1="10" x2="10" y2="0" stroke="black" />
+    <circle cx="5" cy="5" r="5" fill="grey" />
+  </svg>
+</svg>
\ No newline at end of file
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/nestedSvgHeightPercentTest.svg b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/nestedSvgHeightPercentTest.svg
new file mode 100644
index 0000000000..700b75413d
--- /dev/null
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/nestedSvgHeightPercentTest.svg
@@ -0,0 +1,7 @@
+<svg viewBox="0 0 400 400" xmlns="http://www.w3.org/2000/svg">
+  <line x1="0" y1="50" x2="400" y2="50" stroke="black" />
+  <line x1="175" y1="0" x2="175" y2="400" stroke="black" />
+  <svg viewBox="0 0 10 10" height="12.5%">
+    <circle cx="5" cy="5" r="5" fill="grey" />
+  </svg>
+</svg>
\ No newline at end of file
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/nestedSvgWidthEmTest.svg b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/nestedSvgWidthEmTest.svg
new file mode 100644
index 0000000000..431c3d1815
--- /dev/null
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/nestedSvgWidthEmTest.svg
@@ -0,0 +1,8 @@
+<svg viewBox="0 0 400 400" font-size="20" xmlns="http://www.w3.org/2000/svg">
+  <line x1="90" y1="0" x2="90" y2="300" stroke="black" />
+  <circle cx="50" cy="50" r="40" stroke="red" stroke-width="2" fill="grey"/>
+
+  <svg viewBox="0 0 10 10" width="5em">
+    <circle cx="5" cy="5" r="4" stroke="red" stroke-width="1" fill="grey" />
+  </svg>
+</svg>
\ No newline at end of file
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/nestedSvgWidthPercentTest.svg b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/nestedSvgWidthPercentTest.svg
new file mode 100644
index 0000000000..47de0c3a5f
--- /dev/null
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/nestedSvgWidthPercentTest.svg
@@ -0,0 +1,8 @@
+<svg viewBox="0 0 400 400" xmlns="http://www.w3.org/2000/svg">
+  <line x1="90" y1="0" x2="90" y2="300" stroke="black" />
+  <circle cx="50" cy="50" r="40" stroke="red" stroke-width="2" fill="grey"/>
+
+  <svg viewBox="0 0 10 10" width="25%">
+    <circle cx="5" cy="5" r="4" stroke="red" stroke-width="1" fill="grey" />
+  </svg>
+</svg>
\ No newline at end of file
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/nestedSvgXPercentTest.svg b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/nestedSvgXPercentTest.svg
new file mode 100644
index 0000000000..82ab30e45a
--- /dev/null
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/nestedSvgXPercentTest.svg
@@ -0,0 +1,6 @@
+<svg viewBox="0 0 400 400" xmlns="http://www.w3.org/2000/svg">
+  <line x1="100" y1="0" x2="100" y2="300" stroke="black" />
+  <svg viewBox="0 0 10 10" x="25%" width="100" height="100">
+    <circle cx="5" cy="5" r="5" fill="grey" />
+  </svg>
+</svg>
\ No newline at end of file
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/nestedSvgYPercentTest.svg b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/nestedSvgYPercentTest.svg
new file mode 100644
index 0000000000..3d1b3270b7
--- /dev/null
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/nestedSvgYPercentTest.svg
@@ -0,0 +1,6 @@
+<svg viewBox="0 0 400 400" xmlns="http://www.w3.org/2000/svg">
+  <line x1="0" y1="100" x2="300" y2="100" stroke="black" />
+  <svg viewBox="0 0 10 10" y="25%" width="100" height="100">
+    <circle cx="5" cy="5" r="5" fill="grey" />
+  </svg>
+</svg>
\ No newline at end of file
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/noViewBoxAndViewPortPercentTest.svg b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/noViewBoxAndViewPortPercentTest.svg
new file mode 100644
index 0000000000..378eb0275a
--- /dev/null
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/noViewBoxAndViewPortPercentTest.svg
@@ -0,0 +1,4 @@
+<svg  xmlns="http://www.w3.org/2000/svg">
+    <line x1="0" y1="50%" x2="100%" y2="50%" stroke="green" />
+    <line x1="50%" y1="0" x2="50%" y2="100%" stroke="green" />
+</svg>
\ No newline at end of file
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/noViewBoxPercentTest.svg b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/noViewBoxPercentTest.svg
new file mode 100644
index 0000000000..200900d23e
--- /dev/null
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/noViewBoxPercentTest.svg
@@ -0,0 +1,4 @@
+<svg width="100" height="400" xmlns="http://www.w3.org/2000/svg">
+    <line x1="0" y1="50%" x2="100%" y2="50%" stroke="green" />
+    <line x1="50%" y1="0" x2="50%" y2="100%" stroke="green" />
+</svg>
\ No newline at end of file
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/svgHeightPercentTest.svg b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/svgHeightPercentTest.svg
new file mode 100644
index 0000000000..50fe9ed7a0
--- /dev/null
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/svgHeightPercentTest.svg
@@ -0,0 +1,5 @@
+<svg height="50%" xmlns="http://www.w3.org/2000/svg">
+  <line x1="90" y1="0" x2="90" y2="100%" stroke="black" />
+  <line x1="0" y1="50" x2="100%" y2="50" stroke="black" />
+  <circle cx="50" cy="50" r="40" stroke="red" stroke-width="2" fill="grey"/>
+</svg>
\ No newline at end of file
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/svgViewboxWidthPercentTest.svg b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/svgViewboxWidthPercentTest.svg
new file mode 100644
index 0000000000..6ed8ca1468
--- /dev/null
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/svgViewboxWidthPercentTest.svg
@@ -0,0 +1,5 @@
+<svg viewBox="0 0 200 200" width="50%" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+  <line x1="90" y1="0" x2="90" y2="100%" stroke="black" />
+  <line x1="0" y1="50" x2="100%" y2="50" stroke="black" />
+  <circle cx="50" cy="50" r="40" stroke="red" stroke-width="2" fill="grey"/>
+</svg>
\ No newline at end of file
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/svgWidthAndHeightEmAndRemTest.svg b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/svgWidthAndHeightEmAndRemTest.svg
new file mode 100644
index 0000000000..2a31507eaf
--- /dev/null
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/svgWidthAndHeightEmAndRemTest.svg
@@ -0,0 +1,5 @@
+<svg width="10em" height="6rem" xmlns="http://www.w3.org/2000/svg">
+  <line x1="90" y1="0" x2="90" y2="100%" stroke="black" />
+  <line x1="0" y1="50" x2="100%" y2="50" stroke="black" />
+  <circle cx="50" cy="50" r="40" stroke="red" stroke-width="2" fill="grey"/>
+</svg>
\ No newline at end of file
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/svgWidthPercentTest.svg b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/svgWidthPercentTest.svg
new file mode 100644
index 0000000000..7a23366afd
--- /dev/null
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/svgWidthPercentTest.svg
@@ -0,0 +1,5 @@
+<svg width="50%" xmlns="http://www.w3.org/2000/svg">
+  <line x1="90" y1="0" x2="90" y2="100%" stroke="black" />
+  <line x1="0" y1="50" x2="100%" y2="50" stroke="black" />
+  <circle cx="50" cy="50" r="40" stroke="red" stroke-width="2" fill="grey"/>
+</svg>
\ No newline at end of file
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/symbolWidthAndHeightEmAndRemTest.svg b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/symbolWidthAndHeightEmAndRemTest.svg
new file mode 100644
index 0000000000..2d64137d8e
--- /dev/null
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/symbolWidthAndHeightEmAndRemTest.svg
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg viewBox="0 0 200 200" width="400" height="400" font-size="20" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+	<symbol font-size="10" id="myDot" x="20" y="0" width="3em" height="1rem">
+		<circle cx="20" cy="20" r="20"/>
+	</symbol>
+
+	<line x1="0" y1="40" x2="100" y2="40" stroke="blue" />
+	<use xlink:href="#myDot" x="20" y="20"/>
+	<line x1="70" y1="0" x2="70" y2="100" stroke="blue" />
+</svg>
\ No newline at end of file
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/symbolWidthAndHeightPercentTest.svg b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/symbolWidthAndHeightPercentTest.svg
new file mode 100644
index 0000000000..c4079b4274
--- /dev/null
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/symbolWidthAndHeightPercentTest.svg
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg viewBox="0 0 200 200" width="400" height="400" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+	<symbol id="myDot" x="20" y="0" width="15%" height="10%">
+		<circle cx="20" cy="20" r="20"/>
+	</symbol>
+
+	<line x1="0" y1="40" x2="100" y2="40" stroke="blue" />
+	<use xlink:href="#myDot" x="20" y="20"/>
+	<line x1="70" y1="0" x2="70" y2="100" stroke="blue" />
+</svg>
\ No newline at end of file
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/symbolXAndYEmAndRemTest.svg b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/symbolXAndYEmAndRemTest.svg
new file mode 100644
index 0000000000..df0550da30
--- /dev/null
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/symbolXAndYEmAndRemTest.svg
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg viewBox="0 0 200 200" width="400" height="400" font-size="20" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+	<symbol font-size="10" id="myDot" x="2em" y="1.5rem">
+		<circle cx="10" cy="20" r="20"/>
+	</symbol>
+
+	<line x1="0" y1="50" x2="100" y2="50" stroke="red" />
+	<use xlink:href="#myDot" x="20" y="20"/>
+	<line x1="40" y1="0" x2="40" y2="100" stroke="blue" />
+</svg>
\ No newline at end of file
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/symbolXPercentTest.svg b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/symbolXPercentTest.svg
new file mode 100644
index 0000000000..ccad59fbe4
--- /dev/null
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/symbolXPercentTest.svg
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg viewBox="0 0 200 200" width="400" height="400" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+	<symbol id="myDot" x="10%"  y="0">
+		<circle cx="10" cy="20" r="20"/>
+	</symbol>
+
+	<line x1="20" y1="0" x2="20" y2="100" stroke="red" />
+	<use xlink:href="#myDot" x="20" y="20"/>
+	<line x1="40" y1="0" x2="40" y2="100" stroke="blue" />
+</svg>
\ No newline at end of file
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/symbolYPercentTest.svg b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/symbolYPercentTest.svg
new file mode 100644
index 0000000000..9096463e85
--- /dev/null
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/symbolYPercentTest.svg
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg viewBox="0 0 200 200" width="400" height="400" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+	<symbol id="myDot" x="0"  y="10%">
+		<circle cx="10" cy="20" r="20"/>
+	</symbol>
+
+	<line x1="0" y1="20" x2="100" y2="20" stroke="red" />
+	<use xlink:href="#myDot" x="20" y="20"/>
+	<line x1="0" y1="40" x2="100" y2="40" stroke="blue" />
+</svg>
\ No newline at end of file
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/useWidthPercentTest.svg b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/useWidthPercentTest.svg
new file mode 100644
index 0000000000..fd87741228
--- /dev/null
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/useWidthPercentTest.svg
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg viewBox="0 0 200 200" width="400" height="400" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+	<symbol id="myDot" x="0"  y="0">
+		<circle cx="20" cy="20" r="20"/>
+	</symbol>
+
+	<!-- <line x1="120" y1="0" x2="120" y2="150" stroke="red" /> -->
+	<use xlink:href="#myDot" width="10%"/>
+	<circle cx="20" cy="60" r="20"/>
+</svg>
\ No newline at end of file
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/useXAndYEmAndRemTest.svg b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/useXAndYEmAndRemTest.svg
new file mode 100644
index 0000000000..9139e9c039
--- /dev/null
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/useXAndYEmAndRemTest.svg
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg viewBox="0 0 200 200" width="400" height="400" font-size="20" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+	<symbol id="myDot" x="0"  y="0">
+		<circle cx="10" cy="20" r="20"/>
+	</symbol>
+
+	<line x1="120" y1="0" x2="120" y2="150" stroke="red" />
+	<use font-size="10" xlink:href="#myDot" x="9em" y="2rem"/>
+	<circle cx="100" cy="100" r="20"/>
+</svg>
\ No newline at end of file
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/useXPercentTest.svg b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/useXPercentTest.svg
new file mode 100644
index 0000000000..2f3fb6ca4b
--- /dev/null
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/useXPercentTest.svg
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg viewBox="0 0 200 200" width="400" height="400" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+	<symbol id="myDot" x="0"  y="0">
+		<circle cx="10" cy="20" r="20"/>
+	</symbol>
+
+	<line x1="120" y1="0" x2="120" y2="150" stroke="red" />
+	<use xlink:href="#myDot" x="45%" y="40"/>
+	<circle cx="100" cy="100" r="20"/>
+</svg>
\ No newline at end of file
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/useYPercentTest.svg b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/useYPercentTest.svg
new file mode 100644
index 0000000000..32d629241c
--- /dev/null
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/useYPercentTest.svg
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg viewBox="0 0 200 200" width="400" height="400" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+	<symbol id="myDot" x="0"  y="0">
+		<circle cx="10" cy="20" r="20"/>
+	</symbol>
+
+	<line x1="0" y1="80" x2="120" y2="80" stroke="red" />
+	<use xlink:href="#myDot" x="50" y="40%"/>
+	<circle cx="100" cy="100" r="20"/>
+</svg>
\ No newline at end of file
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/viewportFromConverterPropertiesTest.svg b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/viewportFromConverterPropertiesTest.svg
new file mode 100644
index 0000000000..6ed8ca1468
--- /dev/null
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/css/AttributesRelativeUnitTest/viewportFromConverterPropertiesTest.svg
@@ -0,0 +1,5 @@
+<svg viewBox="0 0 200 200" width="50%" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+  <line x1="90" y1="0" x2="90" y2="100%" stroke="black" />
+  <line x1="0" y1="50" x2="100%" y2="50" stroke="black" />
+  <circle cx="50" cy="50" r="40" stroke="red" stroke-width="2" fill="grey"/>
+</svg>
\ No newline at end of file
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index 6d988d2aac..fcd380df98 100644
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index a622d6e329..5dab54c651 100644
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diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/MediaTest/cmp_mediaQueryScreen.pdf b/itext.tests/itext.svg.tests/resources/itext/svg/css/MediaTest/cmp_mediaQueryScreen.pdf
index fdf6cd9544..79709bb45d 100644
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diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/MediaTest/cmp_mediaQueryWidth.pdf b/itext.tests/itext.svg.tests/resources/itext/svg/css/MediaTest/cmp_mediaQueryWidth.pdf
index 416b868000..192f70d285 100644
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diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/SvgStyleResolver/cmp_fontWeightTest.pdf b/itext.tests/itext.svg.tests/resources/itext/svg/css/SvgStyleResolver/cmp_fontWeightTest.pdf
index 5da5b14209..ca5ae8cccf 100644
Binary files a/itext.tests/itext.svg.tests/resources/itext/svg/css/SvgStyleResolver/cmp_fontWeightTest.pdf and b/itext.tests/itext.svg.tests/resources/itext/svg/css/SvgStyleResolver/cmp_fontWeightTest.pdf differ
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/css/SvgStyleResolver/fontWeightTest.svg b/itext.tests/itext.svg.tests/resources/itext/svg/css/SvgStyleResolver/fontWeightTest.svg
index 1d6950e4e6..d365a22531 100644
--- a/itext.tests/itext.svg.tests/resources/itext/svg/css/SvgStyleResolver/fontWeightTest.svg
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/css/SvgStyleResolver/fontWeightTest.svg
@@ -7,6 +7,12 @@
     font-style: normal;
     src: url('web-fonts/droid-serif-regular.ttf') format('truetype');
     }
+    @font-face {
+    font-family: 'Droid Serif';
+    font-weight: 700;
+    font-style: bold;
+    src: url('web-fonts/droid-serif-bold.ttf') format('truetype');
+    }
 
 </style >
     <g transform="translate(20,265)">
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/DeviceCmykTest/cmp_svgFillColor.pdf b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/DeviceCmykTest/cmp_svgFillColor.pdf
index 60cd77341e..4cae1a7620 100644
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index 831791d99e..77c9b16232 100644
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diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/DeviceCmykTest/cmp_svgStrokeColor.pdf b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/DeviceCmykTest/cmp_svgStrokeColor.pdf
index a7625bfe54..8783849a07 100644
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diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/DeviceCmykTest/svgFillColor.svg b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/DeviceCmykTest/svgFillColor.svg
index 38f825ad88..e601f08a4d 100644
--- a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/DeviceCmykTest/svgFillColor.svg
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/DeviceCmykTest/svgFillColor.svg
@@ -1,4 +1,4 @@
-<svg viewBox="0 0 1200 600">
+<svg viewBox="0 0 1200 600" xmlns="http://www.w3.org/2000/svg">
 <path fill="device-cmyk(0 81% 81% 30%)"
          d= "M 150,205  L179,291 L269,291 L197,345
              L223,431 L150,380 L77,431 L103,345
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index b94f04f596..334bfb0518 100644
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index 6ad0209d0e..50fa4462a0 100644
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diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/PatternTest/cmp_widthHeightXYInPxUnitDiffPatternUnits.pdf b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/PatternTest/cmp_widthHeightXYInPxUnitDiffPatternUnits.pdf
index 9222ed0a2c..560df1dc59 100644
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diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/PatternTest/cmp_widthHeightXYNoMeasureUnit.pdf b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/PatternTest/cmp_widthHeightXYNoMeasureUnit.pdf
index 196f1c4a57..c213d348a7 100644
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diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/PreserveAspectRatioSvgNodeRendererIntegrationTest/MultipleViewBoxes.svg b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/PreserveAspectRatioSvgNodeRendererIntegrationTest/MultipleViewBoxes.svg
index e37b1929df..df4d3ab996 100644
--- a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/PreserveAspectRatioSvgNodeRendererIntegrationTest/MultipleViewBoxes.svg
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/PreserveAspectRatioSvgNodeRendererIntegrationTest/MultipleViewBoxes.svg
@@ -1,4 +1,4 @@
-<svg viewBox="298 421 595 842">
+<svg viewBox="298 421 595 842" xmlns="http://www.w3.org/2000/svg">
     <svg viewBox="80 180 595 842">
         <svg viewBox="0 0 595 842">
 			<svg viewBox="30 40 595 842">
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/PreserveAspectRatioSvgNodeRendererIntegrationTest/OuterZeroCoordinatesViewBox.svg b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/PreserveAspectRatioSvgNodeRendererIntegrationTest/OuterZeroCoordinatesViewBox.svg
index 1a9ebf97f7..65179b4d3b 100644
--- a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/PreserveAspectRatioSvgNodeRendererIntegrationTest/OuterZeroCoordinatesViewBox.svg
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/PreserveAspectRatioSvgNodeRendererIntegrationTest/OuterZeroCoordinatesViewBox.svg
@@ -1,4 +1,4 @@
-<svg viewBox="0 0 595 842">
+<svg viewBox="0 0 595 842" xmlns="http://www.w3.org/2000/svg">
     <svg viewBox="298 421 595 842">
 		<circle r="298" cx="298" cy="421"/>
     </svg>
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/PreserveAspectRatioSvgNodeRendererIntegrationTest/cmp_InnerZeroCoordinatesViewBox.pdf b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/PreserveAspectRatioSvgNodeRendererIntegrationTest/cmp_InnerZeroCoordinatesViewBox.pdf
index 34da723c2c..a84c3c8b97 100644
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diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/PreserveAspectRatioSvgNodeRendererIntegrationTest/cmp_MultipleViewBoxes.pdf b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/PreserveAspectRatioSvgNodeRendererIntegrationTest/cmp_MultipleViewBoxes.pdf
index fa26a4125b..38b3e1f66e 100644
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diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/PreserveAspectRatioSvgNodeRendererIntegrationTest/cmp_OuterZeroCoordinatesViewBox.pdf b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/PreserveAspectRatioSvgNodeRendererIntegrationTest/cmp_OuterZeroCoordinatesViewBox.pdf
index 1d8ad93c93..7906b659b7 100644
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diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/RelativePositionsTest/cmp_relativePositionsBasic2.pdf b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/RelativePositionsTest/cmp_relativePositionsBasic2.pdf
index ab8fec65a4..c28e544a25 100644
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index 33be1a1c9d..c958f9ffc5 100644
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index e674b1e7d5..4df344700f 100644
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index 48495e9583..30c1d0c94b 100644
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new file mode 100644
index 0000000000..627a2442b4
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index 1ec8f58c56..5a0b6e7211 100644
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diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/cmp_classAttrTest.pdf b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/cmp_classAttrTest.pdf
index 1d64aa6464..5cab2b1108 100644
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index 3478b85dac..f05fb5e384 100644
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new file mode 100644
index 0000000000..44956e4456
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diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/cmp_opacityAttrTest.pdf b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/cmp_opacityAttrTest.pdf
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diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/cmp_preserveAspectRatioViewBoxTest.pdf b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/cmp_preserveAspectRatioViewBoxTest.pdf
index 7eb1469bae..ba3d3ac874 100644
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diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/cmp_simpleSymbolTest.pdf b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/cmp_simpleSymbolTest.pdf
index 164bccbce2..596e1be035 100644
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diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/cmp_styleAttrInUseTest.pdf b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/cmp_styleAttrInUseTest.pdf
index 0960f64f91..43e4007d6a 100644
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index 924c12d39d..2f3aa56667 100644
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diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/cmp_useSymbolCoordinatesContrudiction.pdf b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/cmp_useSymbolCoordinatesContrudiction.pdf
index 72422eebed..263099d341 100644
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diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/cmp_useSymbolHeightWidthAllUnitsTest.pdf b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/cmp_useSymbolHeightWidthAllUnitsTest.pdf
index d0109e4bfb..276ebed879 100644
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index c471f77419..10147655d8 100644
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diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/cmp_useTagFirstSymbolAfterTest.pdf b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/cmp_useTagFirstSymbolAfterTest.pdf
index 0226362616..ca503ce979 100644
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diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/cmp_visibilityAttrTest.pdf b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/cmp_visibilityAttrTest.pdf
index 595f29fcf3..729c07c39b 100644
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diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/cmp_widthHeightAttrPercentsPxTest.pdf b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/cmp_widthHeightAttrPercentsPxTest.pdf
index 34309ea35a..82826e2bc4 100644
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diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/cmp_widthPercentsAttrTest.pdf b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/cmp_widthPercentsAttrTest.pdf
index c51d1c021d..08e6c65c5c 100644
Binary files a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/cmp_widthPercentsAttrTest.pdf and b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/cmp_widthPercentsAttrTest.pdf differ
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/cmp_widthPxAttrTest.pdf b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/cmp_widthPxAttrTest.pdf
index acf5deb765..b10b2b9ca6 100644
Binary files a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/cmp_widthPxAttrTest.pdf and b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/cmp_widthPxAttrTest.pdf differ
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/heightEmTest.svg b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/heightEmTest.svg
new file mode 100644
index 0000000000..63d672f5cb
--- /dev/null
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/heightEmTest.svg
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg viewBox="0 0 20 20" width="500" height="500" font-size="15" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+	<symbol id="myDot" height="1em">
+		<circle cx="10" cy="10" r="10"/>
+	</symbol>
+
+	<use xlink:href="#myDot" x="0" y="0"/>
+</svg>
\ No newline at end of file
diff --git a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/heightPercentsAttrTest.svg b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/heightPercentsAttrTest.svg
index 7595e9e81d..c393746363 100644
--- a/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/heightPercentsAttrTest.svg
+++ b/itext.tests/itext.svg.tests/resources/itext/svg/renderers/impl/SymbolTest/heightPercentsAttrTest.svg
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<svg viewBox="0 0 80 20" xmlns="http://www.w3.org/2000/svg"
+<svg viewBox="0 0 20 20" width="500" height="500" xmlns="http://www.w3.org/2000/svg"
 	 xmlns:xlink="http://www.w3.org/1999/xlink">
 	<symbol id="myDot" height="25%">
-		<circle cx="5" cy="5" r="5"/>
+		<circle cx="5" cy="5" r="5" />
 	</symbol>
-	<use xlink:href="#myDot" x="15" y="0"/>
+	<use xlink:href="#myDot" x="10" y="0"/>
 </svg>
\ No newline at end of file
diff --git a/itext/itext.sign/itext.sign.csproj b/itext/itext.sign/itext.sign.csproj
index b1f45cc7a4..04f2dee329 100644
--- a/itext/itext.sign/itext.sign.csproj
+++ b/itext/itext.sign/itext.sign.csproj
@@ -26,7 +26,8 @@
     <ProjectReference Include="..\itext.layout\itext.layout.csproj" />
     <ProjectReference Include="..\itext.pdfa\itext.pdfa.csproj" />
     <ProjectReference Include="..\itext.pdfua\itext.pdfua.csproj" />
-	<ProjectReference Include="..\itext.bouncy-castle-connector\itext.bouncy-castle-connector.csproj" />
+    <ProjectReference Include="..\itext.bouncy-castle-connector\itext.bouncy-castle-connector.csproj" />
+    <ProjectReference Include="..\itext.styledxmlparser\itext.styledxmlparser.csproj" />
   </ItemGroup>
   <PropertyGroup>
     <NoWarn>1701;1702;1591;1570;1572;1573;1574;1580;1584;1658</NoWarn>
diff --git a/itext/itext.sign/itext/signatures/IOcspClientBouncyCastle.cs b/itext/itext.sign/itext/signatures/IOcspClientBouncyCastle.cs
new file mode 100644
index 0000000000..7cd08ddc08
--- /dev/null
+++ b/itext/itext.sign/itext/signatures/IOcspClientBouncyCastle.cs
@@ -0,0 +1,54 @@
+/*
+This file is part of the iText (R) project.
+Copyright (c) 1998-2024 Apryse Group NV
+Authors: Apryse Software.
+
+This program is offered under a commercial and under the AGPL license.
+For commercial licensing, contact us at https://itextpdf.com/sales.  For AGPL licensing, see below.
+
+AGPL licensing:
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+using System;
+using iText.Commons.Bouncycastle.Asn1.Ocsp;
+using iText.Commons.Bouncycastle.Cert;
+
+namespace iText.Signatures {
+    /// <summary>Interface for the Online Certificate Status Protocol (OCSP) Client.</summary>
+    /// <remarks>
+    /// Interface for the Online Certificate Status Protocol (OCSP) Client.
+    /// With a method returning parsed IBasicOCSPResp instead of encoded response.
+    /// </remarks>
+    public interface IOcspClientBouncyCastle : IOcspClient {
+        /// <summary>Gets OCSP response.</summary>
+        /// <remarks>
+        /// Gets OCSP response.
+        /// <para />
+        /// If required,
+        /// <see cref="iText.Commons.Bouncycastle.Asn1.Ocsp.IBasicOcspResponse"/>
+        /// can be checked using
+        /// <see cref="iText.Signatures.Validation.OCSPValidator"/>
+        /// class.
+        /// </remarks>
+        /// <param name="checkCert">the certificate to check</param>
+        /// <param name="rootCert">parent certificate</param>
+        /// <param name="url">to get the verification</param>
+        /// <returns>
+        /// 
+        /// <see cref="iText.Commons.Bouncycastle.Asn1.Ocsp.IBasicOcspResponse"/>
+        /// an OCSP response wrapper
+        /// </returns>
+        IBasicOcspResponse GetBasicOCSPResp(IX509Certificate checkCert, IX509Certificate rootCert, String url);
+    }
+}
diff --git a/itext/itext.sign/itext/signatures/IssuingCertificateRetriever.cs b/itext/itext.sign/itext/signatures/IssuingCertificateRetriever.cs
index 8d58e41bbc..418d392260 100644
--- a/itext/itext.sign/itext/signatures/IssuingCertificateRetriever.cs
+++ b/itext/itext.sign/itext/signatures/IssuingCertificateRetriever.cs
@@ -33,6 +33,7 @@ You should have received a copy of the GNU Affero General Public License
 using iText.Commons.Utils.Collections;
 using iText.Signatures.Logs;
 using iText.Signatures.Validation;
+using iText.StyledXmlParser.Resolver.Resource;
 
 namespace iText.Signatures {
     /// <summary>
@@ -50,15 +51,30 @@ public class IssuingCertificateRetriever : IIssuingCertificateRetriever {
         private readonly IDictionary<String, IList<IX509Certificate>> knownCertificates = new Dictionary<String, IList
             <IX509Certificate>>();
 
+        private readonly IResourceRetriever resourceRetriever;
+
         /// <summary>
         /// Creates
         /// <see cref="IssuingCertificateRetriever"/>
         /// instance.
         /// </summary>
         public IssuingCertificateRetriever() {
+            this.resourceRetriever = new DefaultResourceRetriever();
+        }
+
+        /// <summary>
+        /// Creates
+        /// <see cref="IssuingCertificateRetriever"/>
+        /// instance.
+        /// </summary>
+        /// <param name="resourceRetriever">
+        /// an @{link IResourceRetriever} instance to use for performing http
+        /// requests.
+        /// </param>
+        public IssuingCertificateRetriever(IResourceRetriever resourceRetriever) {
+            this.resourceRetriever = resourceRetriever;
         }
 
-        // Empty constructor.
         /// <summary><inheritDoc/></summary>
         /// <param name="chain">
         /// 
@@ -389,7 +405,7 @@ public virtual bool IsCertificateTrusted(IX509Certificate certificate) {
         /// <see cref="System.IO.Stream"/>.
         /// </returns>
         protected internal virtual Stream GetIssuerCertByURI(String uri) {
-            return SignUtils.GetHttpResponse(new Uri(uri));
+            return resourceRetriever.GetInputStreamByUrl(new Uri(uri));
         }
 
         /// <summary>Parses certificates represented as byte array.</summary>
diff --git a/itext/itext.sign/itext/signatures/OcspClientBouncyCastle.cs b/itext/itext.sign/itext/signatures/OcspClientBouncyCastle.cs
index d488045608..b3f003e26b 100644
--- a/itext/itext.sign/itext/signatures/OcspClientBouncyCastle.cs
+++ b/itext/itext.sign/itext/signatures/OcspClientBouncyCastle.cs
@@ -34,7 +34,7 @@ You should have received a copy of the GNU Affero General Public License
 
 namespace iText.Signatures {
     /// <summary>OcspClient implementation using BouncyCastle.</summary>
-    public class OcspClientBouncyCastle : IOcspClient {
+    public class OcspClientBouncyCastle : IOcspClientBouncyCastle {
         private static readonly IBouncyCastleFactory BOUNCY_CASTLE_FACTORY = BouncyCastleFactoryCreator.GetFactory
             ();
 
@@ -51,24 +51,7 @@ public OcspClientBouncyCastle() {
         }
 
         // Empty constructor in order for default one to not be removed if another one is added.
-        /// <summary>Gets OCSP response.</summary>
-        /// <remarks>
-        /// Gets OCSP response.
-        /// <para />
-        /// If required,
-        /// <see cref="iText.Commons.Bouncycastle.Asn1.Ocsp.IBasicOcspResponse"/>
-        /// can be checked using
-        /// <see cref="iText.Signatures.Validation.OCSPValidator"/>
-        /// class.
-        /// </remarks>
-        /// <param name="checkCert">the certificate to check</param>
-        /// <param name="rootCert">parent certificate</param>
-        /// <param name="url">to get the verification</param>
-        /// <returns>
-        /// 
-        /// <see cref="iText.Commons.Bouncycastle.Asn1.Ocsp.IBasicOcspResponse"/>
-        /// an OCSP response wrapper
-        /// </returns>
+        /// <summary><inheritDoc/></summary>
         public virtual IBasicOcspResponse GetBasicOCSPResp(IX509Certificate checkCert, IX509Certificate rootCert, 
             String url) {
             try {
diff --git a/itext/itext.sign/itext/signatures/validation/RevocationDataValidator.cs b/itext/itext.sign/itext/signatures/validation/RevocationDataValidator.cs
index 11aed3377f..5be659e4c6 100644
--- a/itext/itext.sign/itext/signatures/validation/RevocationDataValidator.cs
+++ b/itext/itext.sign/itext/signatures/validation/RevocationDataValidator.cs
@@ -116,6 +116,8 @@ public class RevocationDataValidator {
 
         private readonly CRLValidator crlValidator;
 
+        private readonly ValidatorChainBuilder builder;
+
         /// <summary>
         /// Creates new
         /// <see cref="RevocationDataValidator"/>
@@ -132,6 +134,7 @@ protected internal RevocationDataValidator(ValidatorChainBuilder builder) {
             this.crlValidator = builder.GetCRLValidator();
             this.crlClients.AddAll(this.properties.GetCrlClients());
             this.ocspClients.AddAll(this.properties.GetOcspClients());
+            this.builder = builder;
         }
 
         /// <summary>
@@ -139,6 +142,14 @@ protected internal RevocationDataValidator(ValidatorChainBuilder builder) {
         /// <see cref="iText.Signatures.ICrlClient"/>
         /// to be used for CRL responses receiving.
         /// </summary>
+        /// <remarks>
+        /// Add
+        /// <see cref="iText.Signatures.ICrlClient"/>
+        /// to be used for CRL responses receiving.
+        /// These clients will be used regardless of the
+        /// <see cref="OnlineFetching"/>
+        /// settings
+        /// </remarks>
         /// <param name="crlClient">
         /// 
         /// <see cref="iText.Signatures.ICrlClient"/>
@@ -158,6 +169,14 @@ public virtual iText.Signatures.Validation.RevocationDataValidator AddCrlClient(
         /// <see cref="iText.Signatures.IOcspClient"/>
         /// to be used for OCSP responses receiving.
         /// </summary>
+        /// <remarks>
+        /// Add
+        /// <see cref="iText.Signatures.IOcspClient"/>
+        /// to be used for OCSP responses receiving.
+        /// These clients will be used regardless of the
+        /// <see cref="OnlineFetching"/>
+        /// settings
+        /// </remarks>
         /// <param name="ocspClient">
         /// 
         /// <see cref="iText.Signatures.IOcspClient"/>
@@ -388,8 +407,7 @@ private void ValidateRevocationData(ValidationReport report, ValidationContext c
             if (SignatureValidationProperties.OnlineFetching.ALWAYS_FETCH == onlineFetching) {
                 foreach (IX509Certificate issuerCert in issuerCerts) {
                     SafeCalling.OnRuntimeExceptionLog(() => {
-                        IBasicOcspResponse basicOCSPResp = new OcspClientBouncyCastle().GetBasicOCSPResp(certificate, issuerCert, 
-                            null);
+                        IBasicOcspResponse basicOCSPResp = builder.GetOcspClient().GetBasicOCSPResp(certificate, issuerCert, null);
                         FillOcspResponses(ocspResponses, basicOCSPResp, DateTimeUtil.GetCurrentUtcTime(), TimeBasedContext.PRESENT
                             );
                     }
@@ -410,7 +428,7 @@ private void ValidateRevocationData(ValidationReport report, ValidationContext c
             SignatureValidationProperties.OnlineFetching onlineFetching = properties.GetRevocationOnlineFetching(context
                 .SetValidatorContext(ValidatorContext.CRL_VALIDATOR));
             if (SignatureValidationProperties.OnlineFetching.ALWAYS_FETCH == onlineFetching) {
-                crlResponses.AddAll(RetrieveAllCRLResponsesUsingClient(report, certificate, new CrlClientOnline()));
+                crlResponses.AddAll(RetrieveAllCRLResponsesUsingClient(report, certificate, builder.GetCrlClient()));
             }
             // Sort all the CRL responses available based on the most recent revocation data.
             return crlResponses.Sorted((o1, o2) => o2.crl.GetThisUpdate().CompareTo(o1.crl.GetThisUpdate())).ToList();
@@ -423,16 +441,15 @@ private void TryToFetchRevInfoOnline(ValidationReport report, ValidationContext
                 .SetValidatorContext(ValidatorContext.CRL_VALIDATOR));
             if (SignatureValidationProperties.OnlineFetching.FETCH_IF_NO_OTHER_DATA_AVAILABLE == crlOnlineFetching) {
                 // Sort all the CRL responses available based on the most recent revocation data.
-                onlineCrlResponses.AddAll(RetrieveAllCRLResponsesUsingClient(report, certificate, new CrlClientOnline()).Sorted
-                    ((o1, o2) => o2.crl.GetThisUpdate().CompareTo(o1.crl.GetThisUpdate())).ToList());
+                onlineCrlResponses.AddAll(RetrieveAllCRLResponsesUsingClient(report, certificate, builder.GetCrlClient()).
+                    Sorted((o1, o2) => o2.crl.GetThisUpdate().CompareTo(o1.crl.GetThisUpdate())).ToList());
             }
             SignatureValidationProperties.OnlineFetching ocspOnlineFetching = properties.GetRevocationOnlineFetching(context
                 .SetValidatorContext(ValidatorContext.OCSP_VALIDATOR));
             if (SignatureValidationProperties.OnlineFetching.FETCH_IF_NO_OTHER_DATA_AVAILABLE == ocspOnlineFetching) {
                 foreach (IX509Certificate issuerCert in certificateRetriever.RetrieveIssuerCertificate(certificate)) {
                     SafeCalling.OnRuntimeExceptionLog(() => {
-                        IBasicOcspResponse basicOCSPResp = new OcspClientBouncyCastle().GetBasicOCSPResp(certificate, issuerCert, 
-                            null);
+                        IBasicOcspResponse basicOCSPResp = builder.GetOcspClient().GetBasicOCSPResp(certificate, issuerCert, null);
                         IList<RevocationDataValidator.OcspResponseValidationInfo> ocspResponses = new List<RevocationDataValidator.OcspResponseValidationInfo
                             >();
                         FillOcspResponses(ocspResponses, basicOCSPResp, DateTimeUtil.GetCurrentUtcTime(), TimeBasedContext.PRESENT
diff --git a/itext/itext.sign/itext/signatures/validation/ValidatorChainBuilder.cs b/itext/itext.sign/itext/signatures/validation/ValidatorChainBuilder.cs
index c01836f193..ff8c3cbf54 100644
--- a/itext/itext.sign/itext/signatures/validation/ValidatorChainBuilder.cs
+++ b/itext/itext.sign/itext/signatures/validation/ValidatorChainBuilder.cs
@@ -26,6 +26,7 @@ You should have received a copy of the GNU Affero General Public License
 using iText.Kernel.Pdf;
 using iText.Signatures;
 using iText.Signatures.Validation.Report.Xml;
+using iText.StyledXmlParser.Resolver.Resource;
 
 namespace iText.Signatures.Validation {
     /// <summary>A builder class to construct all necessary parts of a validation chain.</summary>
@@ -34,7 +35,7 @@ namespace iText.Signatures.Validation {
     /// The builder can be reused to create multiple instances of a validator.
     /// </remarks>
     public class ValidatorChainBuilder {
-        private SignatureValidationProperties properties;
+        private SignatureValidationProperties properties = new SignatureValidationProperties();
 
         private Func<IssuingCertificateRetriever> certificateRetrieverFactory;
 
@@ -46,14 +47,33 @@ public class ValidatorChainBuilder {
 
         private Func<CRLValidator> crlValidatorFactory;
 
+        private Func<IResourceRetriever> resourceRetrieverFactory;
+
         private Func<DocumentRevisionsValidator> documentRevisionsValidatorFactory;
 
+        private Func<IOcspClientBouncyCastle> ocspClientFactory;
+
+        private Func<ICrlClient> crlClientFactory;
+
         private ICollection<IX509Certificate> trustedCertificates;
 
         private ICollection<IX509Certificate> knownCertificates;
 
         private AdESReportAggregator adESReportAggregator = new NullAdESReportAggregator();
 
+        /// <summary>Creates a ValidatorChainBuilder using default implementations</summary>
+        public ValidatorChainBuilder() {
+            certificateRetrieverFactory = () => BuildIssuingCertificateRetriever();
+            certificateChainValidatorFactory = () => BuildCertificateChainValidator();
+            revocationDataValidatorFactory = () => BuildRevocationDataValidator();
+            ocspValidatorFactory = () => BuildOCSPValidator();
+            crlValidatorFactory = () => BuildCRLValidator();
+            resourceRetrieverFactory = () => new DefaultResourceRetriever();
+            documentRevisionsValidatorFactory = () => BuildDocumentRevisionsValidator();
+            ocspClientFactory = () => new OcspClientBouncyCastle();
+            crlClientFactory = () => new CrlClientOnline();
+        }
+
         /// <summary>
         /// Create a new
         /// <see cref="SignatureValidator"/>
@@ -157,8 +177,8 @@ public virtual CRLValidator BuildCRLValidator() {
         /// </summary>
         /// <param name="documentRevisionsValidatorFactory">the document revisions validator factory method to use</param>
         /// <returns>the current ValidatorChainBuilder.</returns>
-        public virtual ValidatorChainBuilder WithDocumentRevisionsValidatorFactory(Func<DocumentRevisionsValidator
-            > documentRevisionsValidatorFactory) {
+        public virtual iText.Signatures.Validation.ValidatorChainBuilder WithDocumentRevisionsValidatorFactory(Func
+            <DocumentRevisionsValidator> documentRevisionsValidatorFactory) {
             this.documentRevisionsValidatorFactory = documentRevisionsValidatorFactory;
             return this;
         }
@@ -170,11 +190,25 @@ public virtual ValidatorChainBuilder WithDocumentRevisionsValidatorFactory(Func<
         /// </summary>
         /// <param name="crlValidatorFactory">the CRLValidatorFactory method to use</param>
         /// <returns>the current ValidatorChainBuilder.</returns>
-        public virtual ValidatorChainBuilder WithCRLValidatorFactory(Func<CRLValidator> crlValidatorFactory) {
+        public virtual iText.Signatures.Validation.ValidatorChainBuilder WithCRLValidatorFactory(Func<CRLValidator
+            > crlValidatorFactory) {
             this.crlValidatorFactory = crlValidatorFactory;
             return this;
         }
 
+        /// <summary>
+        /// Use this factory method to create instances of
+        /// <see cref="iText.StyledXmlParser.Resolver.Resource.IResourceRetriever"/>
+        /// for use in the validation chain.
+        /// </summary>
+        /// <param name="resourceRetrieverFactory">the ResourceRetrieverFactory method to use.</param>
+        /// <returns>the current ValidatorChainBuilder.</returns>
+        public virtual iText.Signatures.Validation.ValidatorChainBuilder WithResourceRetriever(Func<IResourceRetriever
+            > resourceRetrieverFactory) {
+            this.resourceRetrieverFactory = resourceRetrieverFactory;
+            return this;
+        }
+
         /// <summary>
         /// Use this factory method to create instances of
         /// <see cref="OCSPValidator"/>
@@ -182,7 +216,8 @@ public virtual ValidatorChainBuilder WithCRLValidatorFactory(Func<CRLValidator>
         /// </summary>
         /// <param name="ocspValidatorFactory">the OCSPValidatorFactory method to use</param>
         /// <returns>the current ValidatorChainBuilder.</returns>
-        public virtual ValidatorChainBuilder WithOCSPValidatorFactory(Func<OCSPValidator> ocspValidatorFactory) {
+        public virtual iText.Signatures.Validation.ValidatorChainBuilder WithOCSPValidatorFactory(Func<OCSPValidator
+            > ocspValidatorFactory) {
             this.ocspValidatorFactory = ocspValidatorFactory;
             return this;
         }
@@ -194,8 +229,8 @@ public virtual ValidatorChainBuilder WithOCSPValidatorFactory(Func<OCSPValidator
         /// </summary>
         /// <param name="revocationDataValidatorFactory">the RevocationDataValidator factory method to use</param>
         /// <returns>the current ValidatorChainBuilder.</returns>
-        public virtual ValidatorChainBuilder WithRevocationDataValidatorFactory(Func<RevocationDataValidator> revocationDataValidatorFactory
-            ) {
+        public virtual iText.Signatures.Validation.ValidatorChainBuilder WithRevocationDataValidatorFactory(Func<RevocationDataValidator
+            > revocationDataValidatorFactory) {
             this.revocationDataValidatorFactory = revocationDataValidatorFactory;
             return this;
         }
@@ -207,8 +242,8 @@ public virtual ValidatorChainBuilder WithRevocationDataValidatorFactory(Func<Rev
         /// </summary>
         /// <param name="certificateChainValidatorFactory">the CertificateChainValidator factory method to use</param>
         /// <returns>the current ValidatorChainBuilder.</returns>
-        public virtual ValidatorChainBuilder WithCertificateChainValidatorFactory(Func<CertificateChainValidator> 
-            certificateChainValidatorFactory) {
+        public virtual iText.Signatures.Validation.ValidatorChainBuilder WithCertificateChainValidatorFactory(Func
+            <CertificateChainValidator> certificateChainValidatorFactory) {
             this.certificateChainValidatorFactory = certificateChainValidatorFactory;
             return this;
         }
@@ -220,8 +255,8 @@ public virtual ValidatorChainBuilder WithCertificateChainValidatorFactory(Func<C
         /// </summary>
         /// <param name="properties">the SignatureValidationProperties instance to use</param>
         /// <returns>the current ValidatorChainBuilder.</returns>
-        public virtual ValidatorChainBuilder WithSignatureValidationProperties(SignatureValidationProperties properties
-            ) {
+        public virtual iText.Signatures.Validation.ValidatorChainBuilder WithSignatureValidationProperties(SignatureValidationProperties
+             properties) {
             this.properties = properties;
             return this;
         }
@@ -233,20 +268,46 @@ public virtual ValidatorChainBuilder WithSignatureValidationProperties(Signature
         /// </summary>
         /// <param name="certificateRetrieverFactory">the IssuingCertificateRetriever factory method to use</param>
         /// <returns>the current ValidatorChainBuilder.</returns>
-        public virtual ValidatorChainBuilder WithIssuingCertificateRetrieverFactory(Func<IssuingCertificateRetriever
-            > certificateRetrieverFactory) {
+        public virtual iText.Signatures.Validation.ValidatorChainBuilder WithIssuingCertificateRetrieverFactory(Func
+            <IssuingCertificateRetriever> certificateRetrieverFactory) {
             this.certificateRetrieverFactory = certificateRetrieverFactory;
             return this;
         }
 
+        /// <summary>
+        /// Use this factory to create instances of
+        /// <see cref="iText.Signatures.IOcspClientBouncyCastle"/>
+        /// for use in the validation chain.
+        /// </summary>
+        /// <param name="ocspClientFactory">the IOcspClient factory method to use</param>
+        /// <returns>the current ValidatorChainBuilder.</returns>
+        public virtual iText.Signatures.Validation.ValidatorChainBuilder WithOcspClient(Func<IOcspClientBouncyCastle
+            > ocspClientFactory) {
+            this.ocspClientFactory = ocspClientFactory;
+            return this;
+        }
+
+        /// <summary>
+        /// Use this factory to create instances of
+        /// <see cref="iText.Signatures.ICrlClient"/>
+        /// for use in the validation chain.
+        /// </summary>
+        /// <param name="crlClientFactory">the ICrlClient factory method to use</param>
+        /// <returns>the current ValidatorChainBuilder.</returns>
+        public virtual iText.Signatures.Validation.ValidatorChainBuilder WithCrlClient(Func<ICrlClient> crlClientFactory
+            ) {
+            this.crlClientFactory = crlClientFactory;
+            return this;
+        }
+
         /// <summary>
         /// Adds known certificates to the
         /// <see cref="iText.Signatures.IssuingCertificateRetriever"/>.
         /// </summary>
         /// <param name="knownCertificates">the list of known certificates to add</param>
         /// <returns>the current ValidatorChainBuilder.</returns>
-        public virtual ValidatorChainBuilder WithKnownCertificates(ICollection<IX509Certificate> knownCertificates
-            ) {
+        public virtual iText.Signatures.Validation.ValidatorChainBuilder WithKnownCertificates(ICollection<IX509Certificate
+            > knownCertificates) {
             this.knownCertificates = new List<IX509Certificate>(knownCertificates);
             return this;
         }
@@ -257,8 +318,8 @@ public virtual ValidatorChainBuilder WithKnownCertificates(ICollection<IX509Cert
         /// </summary>
         /// <param name="trustedCertificates">the list of trusted certificates to set</param>
         /// <returns>the current ValidatorChainBuilder.</returns>
-        public virtual ValidatorChainBuilder WithTrustedCertificates(ICollection<IX509Certificate> trustedCertificates
-            ) {
+        public virtual iText.Signatures.Validation.ValidatorChainBuilder WithTrustedCertificates(ICollection<IX509Certificate
+            > trustedCertificates) {
             this.trustedCertificates = new List<IX509Certificate>(trustedCertificates);
             return this;
         }
@@ -275,7 +336,8 @@ public virtual ValidatorChainBuilder WithTrustedCertificates(ICollection<IX509Ce
         /// </remarks>
         /// <param name="adESReportAggregator">the report aggregator to use</param>
         /// <returns>the current ValidatorChainBuilder</returns>
-        public virtual ValidatorChainBuilder WithAdESReportAggregator(AdESReportAggregator adESReportAggregator) {
+        public virtual iText.Signatures.Validation.ValidatorChainBuilder WithAdESReportAggregator(AdESReportAggregator
+             adESReportAggregator) {
             this.adESReportAggregator = adESReportAggregator;
             return this;
         }
@@ -291,9 +353,6 @@ public virtual ValidatorChainBuilder WithAdESReportAggregator(AdESReportAggregat
         /// instance.
         /// </returns>
         public virtual IssuingCertificateRetriever GetCertificateRetriever() {
-            if (certificateRetrieverFactory == null) {
-                return BuildIssuingCertificateRetriever();
-            }
             return certificateRetrieverFactory();
         }
 
@@ -308,9 +367,6 @@ public virtual IssuingCertificateRetriever GetCertificateRetriever() {
         /// instance.
         /// </returns>
         public virtual SignatureValidationProperties GetProperties() {
-            if (properties == null) {
-                properties = new SignatureValidationProperties();
-            }
             return properties;
         }
 
@@ -347,9 +403,6 @@ public virtual AdESReportAggregator GetAdESReportAggregator() {
         /// instance.
         /// </returns>
         internal virtual DocumentRevisionsValidator GetDocumentRevisionsValidator() {
-            if (documentRevisionsValidatorFactory == null) {
-                return BuildDocumentRevisionsValidator();
-            }
             return documentRevisionsValidatorFactory();
         }
 //\endcond
@@ -366,9 +419,6 @@ internal virtual DocumentRevisionsValidator GetDocumentRevisionsValidator() {
         /// instance.
         /// </returns>
         internal virtual CertificateChainValidator GetCertificateChainValidator() {
-            if (certificateChainValidatorFactory == null) {
-                return BuildCertificateChainValidator();
-            }
             return certificateChainValidatorFactory();
         }
 //\endcond
@@ -385,13 +435,56 @@ internal virtual CertificateChainValidator GetCertificateChainValidator() {
         /// instance.
         /// </returns>
         internal virtual RevocationDataValidator GetRevocationDataValidator() {
-            if (revocationDataValidatorFactory == null) {
-                return BuildRevocationDataValidator();
-            }
             return revocationDataValidatorFactory();
         }
 //\endcond
 
+//\cond DO_NOT_DOCUMENT
+        /// <summary>
+        /// Retrieves the explicitly added or automatically created
+        /// <see cref="iText.Signatures.ICrlClient"/>
+        /// instance.
+        /// </summary>
+        /// <returns>
+        /// the explicitly added or automatically created
+        /// <see cref="iText.Signatures.ICrlClient"/>
+        /// instance.
+        /// </returns>
+        internal virtual ICrlClient GetCrlClient() {
+            return crlClientFactory();
+        }
+//\endcond
+
+//\cond DO_NOT_DOCUMENT
+        /// <summary>
+        /// Retrieves the explicitly added or automatically created
+        /// <see cref="iText.Signatures.IOcspClientBouncyCastle"/>
+        /// instance.
+        /// </summary>
+        /// <returns>
+        /// the explicitly added or automatically created
+        /// <see cref="iText.Signatures.IOcspClientBouncyCastle"/>
+        /// instance.
+        /// </returns>
+        internal virtual IOcspClientBouncyCastle GetOcspClient() {
+            return ocspClientFactory();
+        }
+//\endcond
+
+        /// <summary>
+        /// Retrieves the explicitly added or automatically created
+        /// <see cref="iText.StyledXmlParser.Resolver.Resource.IResourceRetriever"/>
+        /// instance.
+        /// </summary>
+        /// <returns>
+        /// the explicitly added or automatically created
+        /// <see cref="iText.StyledXmlParser.Resolver.Resource.IResourceRetriever"/>
+        /// instance.
+        /// </returns>
+        public virtual IResourceRetriever GetResourceRetriever() {
+            return resourceRetrieverFactory();
+        }
+
 //\cond DO_NOT_DOCUMENT
         /// <summary>
         /// Retrieves the explicitly added or automatically created
@@ -404,9 +497,6 @@ internal virtual RevocationDataValidator GetRevocationDataValidator() {
         /// instance.
         /// </returns>
         internal virtual CRLValidator GetCRLValidator() {
-            if (crlValidatorFactory == null) {
-                return BuildCRLValidator();
-            }
             return crlValidatorFactory();
         }
 //\endcond
@@ -423,15 +513,12 @@ internal virtual CRLValidator GetCRLValidator() {
         /// instance.
         /// </returns>
         internal virtual OCSPValidator GetOCSPValidator() {
-            if (ocspValidatorFactory == null) {
-                return BuildOCSPValidator();
-            }
             return ocspValidatorFactory();
         }
 //\endcond
 
         private IssuingCertificateRetriever BuildIssuingCertificateRetriever() {
-            IssuingCertificateRetriever result = new IssuingCertificateRetriever();
+            IssuingCertificateRetriever result = new IssuingCertificateRetriever(this.resourceRetrieverFactory());
             if (trustedCertificates != null) {
                 result.SetTrustedCertificates(trustedCertificates);
             }
diff --git a/itext/itext.svg/itext/svg/SvgConstants.cs b/itext/itext.svg/itext/svg/SvgConstants.cs
index b28453db21..3f4ec00eab 100644
--- a/itext/itext.svg/itext/svg/SvgConstants.cs
+++ b/itext/itext.svg/itext/svg/SvgConstants.cs
@@ -612,6 +612,27 @@ public sealed class Values {
             /// <summary>Value representing the default aspect ratio: xmidymid.</summary>
             public const String DEFAULT_ASPECT_RATIO = SvgConstants.Values.XMID_YMID;
 
+            /// <summary>Default svg view port width value.</summary>
+            /// <remarks>
+            /// Default svg view port width value.
+            /// See <a href="https://svgwg.org/specs/integration/#svg-css-sizing">SVG specification</a>.
+            /// </remarks>
+            public const String DEFAULT_VIEWPORT_WIDTH = "300px";
+
+            /// <summary>Default svg view port height value.</summary>
+            /// <remarks>
+            /// Default svg view port height value.
+            /// See <a href="https://svgwg.org/specs/integration/#svg-css-sizing">SVG specification</a>.
+            /// </remarks>
+            public const String DEFAULT_VIEWPORT_HEIGHT = "150px";
+
+            /// <summary>Default width and height value.</summary>
+            /// <remarks>
+            /// Default width and height value.
+            /// See <a href="https://svgwg.org/specs/integration/#svg-css-sizing">SVG specification</a>.
+            /// </remarks>
+            public const String DEFAULT_WIDTH_AND_HEIGHT_VALUE = "100%";
+
             /// <summary>Value representing how to preserve the aspect ratio when dealing with images.</summary>
             public const String DEFER = "defer";
 
@@ -658,6 +679,9 @@ public sealed class Values {
             /// <summary>Value representing the units relation "userSpaceOnUse".</summary>
             public const String USER_SPACE_ON_USE = "userSpaceOnUse";
 
+            /// <summary>The number of viewBox values.</summary>
+            public const int VIEWBOX_VALUES_NUMBER = 4;
+
             /// <summary>Value representing how to align when scaling.</summary>
             public const String XMIN_YMIN = "xminymin";
 
@@ -685,16 +709,8 @@ public sealed class Values {
             /// <summary>Value representing how to align when scaling.</summary>
             public const String XMAX_YMAX = "xmaxymax";
 
+            [Obsolete]
             public const String VERSION1_1 = "1.1";
-
-            /// <summary>Default svg view box width value.</summary>
-            public const String DEFAULT_VIEWBOX_WIDTH = "300px";
-
-            /// <summary>Default svg view box height value.</summary>
-            public const String DEFAULT_VIEWBOX_HEIGHT = "150px";
-
-            /// <summary>The number of viewBox values.</summary>
-            public const int VIEWBOX_VALUES_NUMBER = 4;
         }
     }
 }
diff --git a/itext/itext.svg/itext/svg/converter/SvgConverter.cs b/itext/itext.svg/itext/svg/converter/SvgConverter.cs
index 1492c2d9e3..515dc1dabd 100644
--- a/itext/itext.svg/itext/svg/converter/SvgConverter.cs
+++ b/itext/itext.svg/itext/svg/converter/SvgConverter.cs
@@ -31,14 +31,10 @@ You should have received a copy of the GNU Affero General Public License
 using iText.Kernel.Pdf.Xobject;
 using iText.Layout.Element;
 using iText.StyledXmlParser;
-using iText.StyledXmlParser.Css.Resolve;
-using iText.StyledXmlParser.Css.Util;
 using iText.StyledXmlParser.Node;
 using iText.StyledXmlParser.Node.Impl.Jsoup;
 using iText.StyledXmlParser.Resolver.Resource;
-using iText.Svg;
 using iText.Svg.Exceptions;
-using iText.Svg.Logs;
 using iText.Svg.Processors;
 using iText.Svg.Processors.Impl;
 using iText.Svg.Renderers;
@@ -340,6 +336,9 @@ public static void DrawOnPage(Stream stream, PdfPage page, ISvgConverterProperti
         public static void DrawOnPage(Stream stream, PdfPage page, float x, float y, ISvgConverterProperties props
             ) {
             CheckNull(page);
+            if (props is SvgConverterProperties && ((SvgConverterProperties)props).GetCustomViewport() == null) {
+                ((SvgConverterProperties)props).SetCustomViewport(page.GetMediaBox());
+            }
             DrawOnCanvas(stream, new PdfCanvas(page), x, y, props);
         }
 
@@ -693,9 +692,9 @@ public static void CreatePdf(Stream svgStream, Stream pdfDest, ISvgConverterProp
                     // Extract topmost dimensions
                     CheckNull(topSvgRenderer);
                     CheckNull(pdfDocument);
-                    //Since svg is a single object in the document, rem = em
-                    Rectangle wh = SvgCssUtils.ExtractWidthAndHeight(topSvgRenderer, drawContext.GetCssContext().GetRootFontSize
-                        (), drawContext.GetCssContext().GetRootFontSize());
+                    // Since svg is a single object in the document, em = rem
+                    float em = drawContext.GetCssContext().GetRootFontSize();
+                    Rectangle wh = SvgCssUtils.ExtractWidthAndHeight(topSvgRenderer, em, drawContext);
                     // Adjust pagesize and create new page
                     pdfDocument.SetDefaultPageSize(new PageSize(wh.GetWidth(), wh.GetHeight()));
                     PdfPage page = pdfDocument.AddNewPage();
@@ -878,6 +877,9 @@ private static PdfFormXObject ConvertToXObject(ISvgProcessorResult processorResu
             if (processorResult is SvgProcessorResult) {
                 drawContext.SetCssContext(((SvgProcessorResult)processorResult).GetContext().GetCssContext());
             }
+            if (props is SvgConverterProperties) {
+                drawContext.SetCustomViewport(((SvgConverterProperties)props).GetCustomViewport());
+            }
             drawContext.SetTempFonts(processorResult.GetTempFonts());
             drawContext.AddNamedObjects(processorResult.GetNamedObjects());
             return ConvertToXObject(processorResult.GetRootRenderer(), document, drawContext);
@@ -1143,11 +1145,9 @@ private static PdfFormXObject ConvertToXObject(ISvgNodeRenderer topSvgRenderer,
             CheckNull(topSvgRenderer);
             CheckNull(document);
             CheckNull(context);
-            //Can't determine em value here, so passing default value
-            float defaultFontSize = CssDimensionParsingUtils.ParseAbsoluteFontSize(CssDefaults.GetDefaultValue(SvgConstants.Attributes
-                .FONT_SIZE));
-            Rectangle bbox = SvgCssUtils.ExtractWidthAndHeight(topSvgRenderer, defaultFontSize, context.GetCssContext(
-                ).GetRootFontSize());
+            // Can't determine em value here, so em=rem
+            float em = context.GetCssContext().GetRootFontSize();
+            Rectangle bbox = SvgCssUtils.ExtractWidthAndHeight(topSvgRenderer, em, context);
             PdfFormXObject pdfForm = new PdfFormXObject(bbox);
             PdfCanvas canvas = new PdfCanvas(pdfForm, document);
             context.PushCanvas(canvas);
@@ -1317,7 +1317,7 @@ public static INode Parse(Stream stream, ISvgConverterProperties props) {
         /// to browser default if viewbox is missing as well
         /// <para />
         /// Deprecated in favour of
-        /// <see cref="iText.Svg.Utils.SvgCssUtils.ExtractWidthAndHeight(iText.Svg.Renderers.ISvgNodeRenderer, float, float)
+        /// <see cref="iText.Svg.Utils.SvgCssUtils.ExtractWidthAndHeight(iText.Svg.Renderers.ISvgNodeRenderer, float, iText.Svg.Renderers.SvgDrawContext)
         ///     "/>
         /// </remarks>
         /// <param name="topSvgRenderer">
@@ -1329,45 +1329,10 @@ public static INode Parse(Stream stream, ISvgConverterProperties props) {
         /// <returns>float[2], width is in position 0, height in position 1</returns>
         [Obsolete]
         public static float[] ExtractWidthAndHeight(ISvgNodeRenderer topSvgRenderer) {
-            float[] res = new float[2];
-            float[] values = SvgCssUtils.ParseViewBox(topSvgRenderer);
-            float width;
-            float height;
-            String wString;
-            String hString;
-            wString = topSvgRenderer.GetAttribute(SvgConstants.Attributes.WIDTH);
-            if (wString == null) {
-                if (values != null) {
-                    width = values[2];
-                }
-                else {
-                    //Log Warning
-                    LOGGER.LogWarning(SvgLogMessageConstant.MISSING_WIDTH);
-                    //Set to browser default
-                    width = CssDimensionParsingUtils.ParseAbsoluteLength(SvgConstants.Values.DEFAULT_VIEWBOX_WIDTH);
-                }
-            }
-            else {
-                width = CssDimensionParsingUtils.ParseAbsoluteLength(wString);
-            }
-            hString = topSvgRenderer.GetAttribute(SvgConstants.Attributes.HEIGHT);
-            if (hString == null) {
-                if (values != null) {
-                    height = values[3];
-                }
-                else {
-                    //Log Warning
-                    LOGGER.LogWarning(SvgLogMessageConstant.MISSING_HEIGHT);
-                    //Set to browser default
-                    height = CssDimensionParsingUtils.ParseAbsoluteLength(SvgConstants.Values.DEFAULT_VIEWBOX_HEIGHT);
-                }
-            }
-            else {
-                height = CssDimensionParsingUtils.ParseAbsoluteLength(hString);
-            }
-            res[0] = width;
-            res[1] = height;
-            return res;
+            SvgDrawContext context = new SvgDrawContext(null, null);
+            float em = context.GetCssContext().GetRootFontSize();
+            Rectangle rectangle = SvgCssUtils.ExtractWidthAndHeight(topSvgRenderer, em, context);
+            return new float[] { rectangle.GetX(), rectangle.GetY(), rectangle.GetWidth(), rectangle.GetHeight() };
         }
 
 //\cond DO_NOT_DOCUMENT
diff --git a/itext/itext.svg/itext/svg/css/SvgCssContext.cs b/itext/itext.svg/itext/svg/css/SvgCssContext.cs
index 1e4c63eb4e..30f6f0cb03 100644
--- a/itext/itext.svg/itext/svg/css/SvgCssContext.cs
+++ b/itext/itext.svg/itext/svg/css/SvgCssContext.cs
@@ -23,7 +23,7 @@ You should have received a copy of the GNU Affero General Public License
 using System;
 using iText.StyledXmlParser.Css.Resolve;
 using iText.StyledXmlParser.Css.Util;
-using iText.Svg;
+using iText.Svg.Css.Impl;
 
 namespace iText.Svg.Css {
     /// <summary>
@@ -32,8 +32,7 @@ namespace iText.Svg.Css {
     /// </summary>
     public class SvgCssContext : AbstractCssContext {
         /// <summary>The root font size value in pt.</summary>
-        private float rootFontSize = CssDimensionParsingUtils.ParseAbsoluteFontSize(CssDefaults.GetDefaultValue(SvgConstants.Attributes
-            .FONT_SIZE));
+        private float rootFontSize = SvgStyleResolver.DEFAULT_FONT_SIZE;
 
         /// <summary>Gets the root font size.</summary>
         /// <returns>the root font size in pt</returns>
diff --git a/itext/itext.svg/itext/svg/css/impl/SvgStyleResolver.cs b/itext/itext.svg/itext/svg/css/impl/SvgStyleResolver.cs
index d8e996a5af..c31499d46f 100644
--- a/itext/itext.svg/itext/svg/css/impl/SvgStyleResolver.cs
+++ b/itext/itext.svg/itext/svg/css/impl/SvgStyleResolver.cs
@@ -49,14 +49,14 @@ public class SvgStyleResolver : ICssResolver {
             (new HashSet<IStyleInheritance>(JavaUtil.ArraysAsList((IStyleInheritance)new CssInheritance(), (IStyleInheritance
             )new SvgAttributeInheritance())));
 
+        public static readonly float DEFAULT_FONT_SIZE = CssDimensionParsingUtils.ParseAbsoluteFontSize(CssDefaults
+            .GetDefaultValue(SvgConstants.Attributes.FONT_SIZE));
+
         // TODO: DEVSIX-3923 remove normalization (.toLowerCase)
         private static readonly String[] ELEMENTS_INHERITING_PARENT_STYLES = new String[] { SvgConstants.Tags.MARKER
             , SvgConstants.Tags.LINEAR_GRADIENT, SvgConstants.Tags.LINEAR_GRADIENT.ToLowerInvariant(), SvgConstants.Tags
             .PATTERN };
 
-        private static readonly float DEFAULT_FONT_SIZE = CssDimensionParsingUtils.ParseAbsoluteFontSize(CssDefaults
-            .GetDefaultValue(SvgConstants.Attributes.FONT_SIZE));
-
         private static readonly ILogger LOGGER = ITextLogManager.GetLogger(typeof(iText.Svg.Css.Impl.SvgStyleResolver
             ));
 
@@ -144,8 +144,7 @@ public static void ResolveFontSizeStyle(IDictionary<String, String> styles, SvgC
                 }
                 else {
                     if (parentFontSizeStr == null) {
-                        baseFontSize = CssDimensionParsingUtils.ParseAbsoluteFontSize(CssDefaults.GetDefaultValue(SvgConstants.Attributes
-                            .FONT_SIZE));
+                        baseFontSize = DEFAULT_FONT_SIZE;
                     }
                     else {
                         baseFontSize = CssDimensionParsingUtils.ParseAbsoluteLength(parentFontSizeStr);
diff --git a/itext/itext.svg/itext/svg/logs/SvgLogMessageConstant.cs b/itext/itext.svg/itext/svg/logs/SvgLogMessageConstant.cs
index 500b6ec6a0..366e1eac06 100644
--- a/itext/itext.svg/itext/svg/logs/SvgLogMessageConstant.cs
+++ b/itext/itext.svg/itext/svg/logs/SvgLogMessageConstant.cs
@@ -49,9 +49,13 @@ public sealed class SvgLogMessageConstant {
 
         public const String PATTERN_WIDTH_OR_HEIGHT_IS_NEGATIVE = "Pattern width or height is negative value. This pattern will not be rendered.";
 
+        /// <summary>The constant not used anymore and will be removed in the next major release.</summary>
+        [Obsolete]
         public const String MISSING_WIDTH = "Top Svg tag has no defined width attribute and viewbox width is not present, so browser default of 300px "
              + "is used";
 
+        /// <summary>The constant not used anymore and will be removed in the next major release.</summary>
+        [Obsolete]
         public const String MISSING_HEIGHT = "Top Svg tag has no defined height attribute and viewbox height is not present, so browser default of "
              + "150px is used";
 
diff --git a/itext/itext.svg/itext/svg/processors/impl/SvgConverterProperties.cs b/itext/itext.svg/itext/svg/processors/impl/SvgConverterProperties.cs
index cab6724e0b..fb464250c1 100644
--- a/itext/itext.svg/itext/svg/processors/impl/SvgConverterProperties.cs
+++ b/itext/itext.svg/itext/svg/processors/impl/SvgConverterProperties.cs
@@ -21,6 +21,7 @@ You should have received a copy of the GNU Affero General Public License
 along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 using System;
+using iText.Kernel.Geom;
 using iText.Layout.Font;
 using iText.StyledXmlParser.Css;
 using iText.StyledXmlParser.Css.Media;
@@ -54,6 +55,8 @@ public class SvgConverterProperties : ISvgConverterProperties {
 
         private CssStyleSheet cssStyleSheet = null;
 
+        private Rectangle customViewport = null;
+
         /// <summary>
         /// Creates a new
         /// <see cref="SvgConverterProperties"/>
@@ -70,6 +73,29 @@ public SvgConverterProperties() {
             this.rendererFactory = new DefaultSvgNodeRendererFactory();
         }
 
+        /// <summary>Gets the custom viewport of SVG.</summary>
+        /// <remarks>
+        /// Gets the custom viewport of SVG.
+        /// <para />
+        /// The custom viewport is used to resolve percent values of the top level svg.
+        /// </remarks>
+        /// <returns>the custom viewport</returns>
+        public virtual Rectangle GetCustomViewport() {
+            // TODO DEVSIX-8808 add this getter to the interface ISvgConverterProperties and remove class casting where getCustomViewport is called
+            return customViewport;
+        }
+
+        /// <summary>Sets the custom viewport of SVG.</summary>
+        /// <remarks>
+        /// Sets the custom viewport of SVG.
+        /// <para />
+        /// The custom viewport is used to resolve percent values of the top level svg.
+        /// </remarks>
+        /// <param name="customViewport">the custom viewport</param>
+        public virtual void SetCustomViewport(Rectangle customViewport) {
+            this.customViewport = customViewport;
+        }
+
         public virtual iText.Svg.Processors.Impl.SvgConverterProperties SetRendererFactory(ISvgNodeRendererFactory
              rendererFactory) {
             this.rendererFactory = rendererFactory;
diff --git a/itext/itext.svg/itext/svg/renderers/SvgDrawContext.cs b/itext/itext.svg/itext/svg/renderers/SvgDrawContext.cs
index 04c2779369..6f813ed135 100644
--- a/itext/itext.svg/itext/svg/renderers/SvgDrawContext.cs
+++ b/itext/itext.svg/itext/svg/renderers/SvgDrawContext.cs
@@ -66,6 +66,8 @@ public class SvgDrawContext {
 
         private float[] relativePosition;
 
+        private Rectangle customViewport;
+
         /// <summary>Create an instance of the context that is used to store information when converting SVG.</summary>
         /// <param name="resourceResolver">
         /// instance of
@@ -87,6 +89,28 @@ public SvgDrawContext(ResourceResolver resourceResolver, FontProvider fontProvid
             cssContext = new SvgCssContext();
         }
 
+        /// <summary>Gets the custom viewport of SVG.</summary>
+        /// <remarks>
+        /// Gets the custom viewport of SVG.
+        /// <para />
+        /// The custom viewport is used to resolve percent values of the top level svg.
+        /// </remarks>
+        /// <returns>the custom viewport</returns>
+        public virtual Rectangle GetCustomViewport() {
+            return customViewport;
+        }
+
+        /// <summary>Sets the custom viewport of SVG.</summary>
+        /// <remarks>
+        /// Sets the custom viewport of SVG.
+        /// <para />
+        /// The custom viewport is used to resolve percent values of the top level svg.
+        /// </remarks>
+        /// <param name="customViewport">the custom viewport</param>
+        public virtual void SetCustomViewport(Rectangle customViewport) {
+            this.customViewport = customViewport;
+        }
+
         /// <summary>Retrieves the current top of the stack, without modifying the stack.</summary>
         /// <returns>the current canvas that can be used for drawing operations.</returns>
         public virtual PdfCanvas GetCurrentCanvas() {
diff --git a/itext/itext.svg/itext/svg/renderers/SvgImageRenderer.cs b/itext/itext.svg/itext/svg/renderers/SvgImageRenderer.cs
index eec8b7a16e..8e0b0c2e2b 100644
--- a/itext/itext.svg/itext/svg/renderers/SvgImageRenderer.cs
+++ b/itext/itext.svg/itext/svg/renderers/SvgImageRenderer.cs
@@ -45,9 +45,5 @@ public override void Draw(DrawContext drawContext) {
             ((SvgImage)modelElement).Generate(drawContext.GetDocument());
             base.Draw(drawContext);
         }
-        //TODO: DEVSIX-8775 probably we need to override ImageRenderer#calculateImageDimensions and calcualte percent
-        // values of svg width and height there by altering layoutBox or affine transform, this is needed to correctly
-        // calculate percent values in root svg element. Though this won't help with svg's loaded as background image in
-        // html2pdf, so this has to be carefully investigated
     }
 }
diff --git a/itext/itext.svg/itext/svg/renderers/impl/AbstractContainerSvgNodeRenderer.cs b/itext/itext.svg/itext/svg/renderers/impl/AbstractContainerSvgNodeRenderer.cs
index abf35ca314..2deb87ed58 100644
--- a/itext/itext.svg/itext/svg/renderers/impl/AbstractContainerSvgNodeRenderer.cs
+++ b/itext/itext.svg/itext/svg/renderers/impl/AbstractContainerSvgNodeRenderer.cs
@@ -20,10 +20,11 @@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 You should have received a copy of the GNU Affero General Public License
 along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
+using System;
 using iText.Kernel.Geom;
-using iText.StyledXmlParser.Css.Util;
 using iText.Svg;
 using iText.Svg.Renderers;
+using iText.Svg.Utils;
 
 namespace iText.Svg.Renderers.Impl {
     public abstract class AbstractContainerSvgNodeRenderer : AbstractBranchSvgNodeRenderer {
@@ -45,33 +46,34 @@ protected internal override void DoDraw(SvgDrawContext context) {
         /// <param name="context">the SVG draw context</param>
         /// <returns>the viewport that applies to this renderer</returns>
         internal virtual Rectangle CalculateViewPort(SvgDrawContext context) {
-            //TODO: DEVSIX-8775 the logic below should be refactored, first of all it shouldn't be applied to root svg tag
-            // (though depending on implementation maybe it won't be a problem), also it need to be adjusted to support em/rem
-            // which seems possible for all cases, and as for percents, I'm not sure it's possible for nested svg tags, but
-            // it should be possible for symbols
-            Rectangle currentViewPort = context.GetCurrentViewPort();
-            // Set default values to parent viewport in the case of a nested svg tag
+            Rectangle percentBaseBox;
+            if (GetParent() is PdfRootSvgNodeRenderer || !(GetParent() is AbstractSvgNodeRenderer)) {
+                // If the current container is a top level SVG, take a current view port as a percent base
+                percentBaseBox = context.GetCurrentViewPort();
+            }
+            else {
+                // If the current container is nested container, take a view box as a percent base
+                percentBaseBox = ((AbstractSvgNodeRenderer)GetParent()).GetCurrentViewBox(context);
+            }
             float portX = 0;
             float portY = 0;
-            // Default should be parent portWidth if not outermost
-            float portWidth = currentViewPort.GetWidth();
-            // Default should be parent height if not outermost
-            float portHeight = currentViewPort.GetHeight();
+            float portWidth = percentBaseBox.GetWidth();
+            float portHeight = percentBaseBox.GetHeight();
             if (attributesAndStyles != null) {
-                if (attributesAndStyles.ContainsKey(SvgConstants.Attributes.X)) {
-                    portX = CssDimensionParsingUtils.ParseAbsoluteLength(attributesAndStyles.Get(SvgConstants.Attributes.X));
-                }
-                if (attributesAndStyles.ContainsKey(SvgConstants.Attributes.Y)) {
-                    portY = CssDimensionParsingUtils.ParseAbsoluteLength(attributesAndStyles.Get(SvgConstants.Attributes.Y));
-                }
-                if (attributesAndStyles.ContainsKey(SvgConstants.Attributes.WIDTH)) {
-                    portWidth = CssDimensionParsingUtils.ParseAbsoluteLength(attributesAndStyles.Get(SvgConstants.Attributes.WIDTH
-                        ));
-                }
-                if (attributesAndStyles.ContainsKey(SvgConstants.Attributes.HEIGHT)) {
-                    portHeight = CssDimensionParsingUtils.ParseAbsoluteLength(attributesAndStyles.Get(SvgConstants.Attributes.
-                        HEIGHT));
-                }
+                portX = SvgCssUtils.ParseAbsoluteLength(this, attributesAndStyles.Get(SvgConstants.Attributes.X), percentBaseBox
+                    .GetWidth(), 0, context);
+                portY = SvgCssUtils.ParseAbsoluteLength(this, attributesAndStyles.Get(SvgConstants.Attributes.Y), percentBaseBox
+                    .GetHeight(), 0, context);
+                String widthStr = attributesAndStyles.Get(SvgConstants.Attributes.WIDTH);
+                // In case widthStr==null, according to SVG spec default value is 100%, it is why default
+                // value is percentBaseBox.getWidth(). See SvgConstants.Values.DEFAULT_WIDTH_AND_HEIGHT_VALUE
+                portWidth = SvgCssUtils.ParseAbsoluteLength(this, widthStr, percentBaseBox.GetWidth(), percentBaseBox.GetWidth
+                    (), context);
+                String heightStr = attributesAndStyles.Get(SvgConstants.Attributes.HEIGHT);
+                // In case heightStr==null, according to SVG spec default value is 100%, it is why default
+                // value is percentBaseBox.getHeight(). See SvgConstants.Values.DEFAULT_WIDTH_AND_HEIGHT_VALUE
+                portHeight = SvgCssUtils.ParseAbsoluteLength(this, heightStr, percentBaseBox.GetHeight(), percentBaseBox.GetHeight
+                    (), context);
             }
             return new Rectangle(portX, portY, portWidth, portHeight);
         }
diff --git a/itext/itext.svg/itext/svg/renderers/impl/AbstractSvgNodeRenderer.cs b/itext/itext.svg/itext/svg/renderers/impl/AbstractSvgNodeRenderer.cs
index a4902d92e0..af40379049 100644
--- a/itext/itext.svg/itext/svg/renderers/impl/AbstractSvgNodeRenderer.cs
+++ b/itext/itext.svg/itext/svg/renderers/impl/AbstractSvgNodeRenderer.cs
@@ -187,14 +187,50 @@ public virtual float GetCurrentFontSize(SvgDrawContext context) {
                 return CssDimensionParsingUtils.ParseRelativeValue(fontSizeAttribute, context.GetCssContext().GetRootFontSize
                     ());
             }
-            if (CssTypesValidationUtils.IsEmValue(fontSizeAttribute) && GetParent() != null && parent is AbstractSvgNodeRenderer
+            if (CssTypesValidationUtils.IsEmValue(fontSizeAttribute) && GetParent() != null && GetParent() is AbstractSvgNodeRenderer
                 ) {
-                return CssDimensionParsingUtils.ParseRelativeValue(fontSizeAttribute, ((AbstractSvgNodeRenderer)parent).GetCurrentFontSize
-                    (context));
+                return CssDimensionParsingUtils.ParseRelativeValue(fontSizeAttribute, ((AbstractSvgNodeRenderer)GetParent(
+                    )).GetCurrentFontSize(context));
             }
             return CssDimensionParsingUtils.ParseAbsoluteFontSize(fontSizeAttribute);
         }
 
+        /// <summary>Gets the viewbox from the first parent element which can define it.</summary>
+        /// <remarks>
+        /// Gets the viewbox from the first parent element which can define it.
+        /// <para />
+        /// See <a href="https://svgwg.org/svg2-draft/coords.html#establishinganewsvgviewport">SVG specification</a>
+        /// to find which elements can define a viewbox.
+        /// </remarks>
+        /// <param name="context">draw context from which fallback viewbox can be extracted</param>
+        /// <returns>
+        /// the viewbox or
+        /// <see langword="null"/>
+        /// if the element doesn't have parent which can define the viewbox
+        /// </returns>
+        public virtual Rectangle GetCurrentViewBox(SvgDrawContext context) {
+            // According to https://svgwg.org/svg2-draft/coords.html#EstablishingANewSVGViewport: "For historical reasons,
+            // the ‘pattern’ and ‘marker’ elements do not create a new viewport, despite accepting a ‘viewBox’ attribute".
+            // So get viewbox only from symbol and svg elements
+            if (this is AbstractContainerSvgNodeRenderer) {
+                float[] viewBoxValues = SvgCssUtils.ParseViewBox(this);
+                if (viewBoxValues == null || viewBoxValues.Length < SvgConstants.Values.VIEWBOX_VALUES_NUMBER) {
+                    Rectangle currentViewPort = context.GetCurrentViewPort();
+                    viewBoxValues = new float[] { 0, 0, currentViewPort.GetWidth(), currentViewPort.GetHeight() };
+                }
+                return new Rectangle(viewBoxValues[0], viewBoxValues[1], viewBoxValues[2], viewBoxValues[3]);
+            }
+            else {
+                if (GetParent() is AbstractSvgNodeRenderer) {
+                    return ((AbstractSvgNodeRenderer)GetParent()).GetCurrentViewBox(context);
+                }
+                else {
+                    // From iText this line isn't reachable, in custom renderer tree fallback to context's view port
+                    return context.GetCurrentViewPort();
+                }
+            }
+        }
+
         /// <summary>
         /// Make a deep copy of the styles and attributes of this renderer
         /// Helper method for deep copying logic
@@ -377,8 +413,7 @@ internal virtual void ApplyFillAndStrokeProperties(AbstractSvgNodeRenderer.FillP
         /// </param>
         /// <returns>absolute length in points</returns>
         protected internal virtual float ParseHorizontalLength(String length, SvgDrawContext context) {
-            return SvgCssUtils.ParseAbsoluteLength(this, length, SvgCoordinateUtils.CalculatePercentBaseValueIfNeeded(
-                context, length, true), 0.0F, context);
+            return SvgCssUtils.ParseAbsoluteHorizontalLength(this, length, 0.0F, context);
         }
 
         /// <summary>Parse y-axis length value.</summary>
@@ -409,8 +444,7 @@ protected internal virtual float ParseHorizontalLength(String length, SvgDrawCon
         /// </param>
         /// <returns>absolute length in points</returns>
         protected internal virtual float ParseVerticalLength(String length, SvgDrawContext context) {
-            return SvgCssUtils.ParseAbsoluteLength(this, length, SvgCoordinateUtils.CalculatePercentBaseValueIfNeeded(
-                context, length, false), 0.0F, context);
+            return SvgCssUtils.ParseAbsoluteVerticalLength(this, length, 0.0F, context);
         }
 
         /// <summary>Parse length attributes.</summary>
@@ -458,6 +492,9 @@ private TransparentColor GetColorFromAttributeValue(SvgDrawContext context, Stri
                 String normalizedName = tokenValue.JSubstring(5, tokenValue.Length - 1).Trim();
                 ISvgNodeRenderer colorRenderer = context.GetNamedObject(normalizedName);
                 if (colorRenderer is ISvgPaintServer) {
+                    if (colorRenderer.GetParent() == null) {
+                        colorRenderer.SetParent(this);
+                    }
                     resolvedColor = ((ISvgPaintServer)colorRenderer).CreateColor(context, GetObjectBoundingBox(context), objectBoundingBoxMargin
                         , parentOpacity);
                 }
diff --git a/itext/itext.svg/itext/svg/renderers/impl/LinearGradientSvgNodeRenderer.cs b/itext/itext.svg/itext/svg/renderers/impl/LinearGradientSvgNodeRenderer.cs
index b3ed79518c..5c227c2648 100644
--- a/itext/itext.svg/itext/svg/renderers/impl/LinearGradientSvgNodeRenderer.cs
+++ b/itext/itext.svg/itext/svg/renderers/impl/LinearGradientSvgNodeRenderer.cs
@@ -131,7 +131,7 @@ private Point[] GetCoordinates(SvgDrawContext context, bool isObjectBoundingBox)
                     .Y2), 0) * CONVERT_COEFF);
             }
             else {
-                Rectangle currentViewPort = context.GetCurrentViewPort();
+                Rectangle currentViewPort = this.GetCurrentViewBox(context);
                 double x = currentViewPort.GetX();
                 double y = currentViewPort.GetY();
                 double width = currentViewPort.GetWidth();
diff --git a/itext/itext.svg/itext/svg/renderers/impl/PatternSvgNodeRenderer.cs b/itext/itext.svg/itext/svg/renderers/impl/PatternSvgNodeRenderer.cs
index ec3c7fefb6..99eb6c6f34 100644
--- a/itext/itext.svg/itext/svg/renderers/impl/PatternSvgNodeRenderer.cs
+++ b/itext/itext.svg/itext/svg/renderers/impl/PatternSvgNodeRenderer.cs
@@ -185,7 +185,7 @@ private Rectangle CalculateOriginalPatternRectangle(SvgDrawContext context, bool
                     0) * CONVERT_COEFF;
             }
             else {
-                Rectangle currentViewPort = context.GetCurrentViewPort();
+                Rectangle currentViewPort = this.GetCurrentViewBox(context);
                 double viewPortX = currentViewPort.GetX();
                 double viewPortY = currentViewPort.GetY();
                 double viewPortWidth = currentViewPort.GetWidth();
diff --git a/itext/itext.svg/itext/svg/renderers/impl/UseSvgNodeRenderer.cs b/itext/itext.svg/itext/svg/renderers/impl/UseSvgNodeRenderer.cs
index 0f59ebbb86..458ade6753 100644
--- a/itext/itext.svg/itext/svg/renderers/impl/UseSvgNodeRenderer.cs
+++ b/itext/itext.svg/itext/svg/renderers/impl/UseSvgNodeRenderer.cs
@@ -57,12 +57,9 @@ protected internal override void DoDraw(SvgDrawContext context) {
                             PdfCanvas currentCanvas = context.GetCurrentCanvas();
                             float x = 0f;
                             float y = 0f;
-                            if (this.attributesAndStyles.ContainsKey(SvgConstants.Attributes.X)) {
-                                x = CssDimensionParsingUtils.ParseAbsoluteLength(this.attributesAndStyles.Get(SvgConstants.Attributes.X));
-                            }
-                            if (this.attributesAndStyles.ContainsKey(SvgConstants.Attributes.Y)) {
-                                y = CssDimensionParsingUtils.ParseAbsoluteLength(this.attributesAndStyles.Get(SvgConstants.Attributes.Y));
-                            }
+                            // If X or Y attribute is null, then default 0 value will be returned
+                            x = ParseHorizontalLength(this.attributesAndStyles.Get(SvgConstants.Attributes.X), context);
+                            y = ParseVerticalLength(this.attributesAndStyles.Get(SvgConstants.Attributes.Y), context);
                             AffineTransform inverseMatrix = null;
                             if (!CssUtils.CompareFloats(x, 0) || !CssUtils.CompareFloats(y, 0)) {
                                 AffineTransform translation = AffineTransform.GetTranslateInstance(x, y);
diff --git a/itext/itext.svg/itext/svg/renderers/path/impl/AbstractPathShape.cs b/itext/itext.svg/itext/svg/renderers/path/impl/AbstractPathShape.cs
index fae70080d4..7877a8d0ea 100644
--- a/itext/itext.svg/itext/svg/renderers/path/impl/AbstractPathShape.cs
+++ b/itext/itext.svg/itext/svg/renderers/path/impl/AbstractPathShape.cs
@@ -117,8 +117,7 @@ public virtual void SetContext(SvgDrawContext context) {
         /// </param>
         /// <returns>absolute length in points</returns>
         protected internal virtual float ParseHorizontalLength(String length) {
-            return SvgCssUtils.ParseAbsoluteLength(parent, length, SvgCoordinateUtils.CalculatePercentBaseValueIfNeeded
-                (context, length, true), 0.0F, context);
+            return SvgCssUtils.ParseAbsoluteHorizontalLength(parent, length, 0.0F, context);
         }
 
         /// <summary>Parse y axis length value.</summary>
@@ -129,8 +128,7 @@ protected internal virtual float ParseHorizontalLength(String length) {
         /// </param>
         /// <returns>absolute length in points</returns>
         protected internal virtual float ParseVerticalLength(String length) {
-            return SvgCssUtils.ParseAbsoluteLength(parent, length, SvgCoordinateUtils.CalculatePercentBaseValueIfNeeded
-                (context, length, false), 0.0F, context);
+            return SvgCssUtils.ParseAbsoluteVerticalLength(parent, length, 0.0F, context);
         }
 
         public abstract void SetCoordinates(String[] arg1, Point arg2);
diff --git a/itext/itext.svg/itext/svg/utils/SvgCoordinateUtils.cs b/itext/itext.svg/itext/svg/utils/SvgCoordinateUtils.cs
index 9c47ded7b6..6ece1ffdfb 100644
--- a/itext/itext.svg/itext/svg/utils/SvgCoordinateUtils.cs
+++ b/itext/itext.svg/itext/svg/utils/SvgCoordinateUtils.cs
@@ -136,28 +136,6 @@ public static float CalculateNormalizedDiagonalLength(SvgDrawContext context) {
             return (float)(Math.Sqrt(viewPortHeight * viewPortHeight + viewPortWidth * viewPortWidth) / Math.Sqrt(2));
         }
 
-        /// <summary>Calculate percent base value if provided length is percent value.</summary>
-        /// <param name="context">svg draw context.</param>
-        /// <param name="length">length to check</param>
-        /// <param name="isXAxis">
-        /// if
-        /// <see langword="true"/>
-        /// viewport's width will be used (x-axis), otherwise viewport's height will be
-        /// used (y-axis)
-        /// </param>
-        /// <returns>percent base value if provided length is percent value, 0.0F otherwise</returns>
-        public static float CalculatePercentBaseValueIfNeeded(SvgDrawContext context, String length, bool isXAxis) {
-            float percentBaseValue = 0.0F;
-            if (CssTypesValidationUtils.IsPercentageValue(length)) {
-                if (context.GetCurrentViewPort() == null) {
-                    throw new SvgProcessingException(SvgExceptionMessageConstant.ILLEGAL_RELATIVE_VALUE_NO_VIEWPORT_IS_SET);
-                }
-                percentBaseValue = isXAxis ? context.GetCurrentViewPort().GetWidth() : context.GetCurrentViewPort().GetHeight
-                    ();
-            }
-            return percentBaseValue;
-        }
-
         /// <summary>Returns the viewBox received after scaling and displacement given preserveAspectRatio.</summary>
         /// <param name="viewBox">
         /// parsed viewBox rectangle. It should be a valid
diff --git a/itext/itext.svg/itext/svg/utils/SvgCssUtils.cs b/itext/itext.svg/itext/svg/utils/SvgCssUtils.cs
index 73d3e297a9..dcc0b62e3b 100644
--- a/itext/itext.svg/itext/svg/utils/SvgCssUtils.cs
+++ b/itext/itext.svg/itext/svg/utils/SvgCssUtils.cs
@@ -28,6 +28,7 @@ You should have received a copy of the GNU Affero General Public License
 using iText.Kernel.Geom;
 using iText.StyledXmlParser.Css.Util;
 using iText.Svg;
+using iText.Svg.Exceptions;
 using iText.Svg.Logs;
 using iText.Svg.Renderers;
 using iText.Svg.Renderers.Impl;
@@ -97,6 +98,44 @@ public static float ParseAbsoluteLength(AbstractSvgNodeRenderer svgNodeRenderer,
             return CssDimensionParsingUtils.ParseLength(length, percentBaseValue, defaultValue, em, rem);
         }
 
+        /// <summary>Parses vertical length attribute and converts it to an absolute value.</summary>
+        /// <param name="svgNodeRenderer">renderer for which length should be parsed</param>
+        /// <param name="length">
+        /// 
+        /// <see cref="System.String"/>
+        /// for parsing
+        /// </param>
+        /// <param name="defaultValue">default value if length is not recognized</param>
+        /// <param name="context">
+        /// current
+        /// <see cref="iText.Svg.Renderers.SvgDrawContext"/>
+        /// </param>
+        /// <returns>absolute value in points</returns>
+        public static float ParseAbsoluteVerticalLength(AbstractSvgNodeRenderer svgNodeRenderer, String length, float
+             defaultValue, SvgDrawContext context) {
+            float percentBaseValue = CalculatePercentBaseValueIfNeeded(svgNodeRenderer, context, length, false);
+            return ParseAbsoluteLength(svgNodeRenderer, length, percentBaseValue, defaultValue, context);
+        }
+
+        /// <summary>Parses horizontal length attribute and converts it to an absolute value.</summary>
+        /// <param name="svgNodeRenderer">renderer for which length should be parsed</param>
+        /// <param name="length">
+        /// 
+        /// <see cref="System.String"/>
+        /// for parsing
+        /// </param>
+        /// <param name="defaultValue">default value if length is not recognized</param>
+        /// <param name="context">
+        /// current
+        /// <see cref="iText.Svg.Renderers.SvgDrawContext"/>
+        /// </param>
+        /// <returns>absolute value in points</returns>
+        public static float ParseAbsoluteHorizontalLength(AbstractSvgNodeRenderer svgNodeRenderer, String length, 
+            float defaultValue, SvgDrawContext context) {
+            float percentBaseValue = CalculatePercentBaseValueIfNeeded(svgNodeRenderer, context, length, true);
+            return ParseAbsoluteLength(svgNodeRenderer, length, percentBaseValue, defaultValue, context);
+        }
+
         /// <summary>Extract svg viewbox values.</summary>
         /// <param name="svgRenderer">
         /// the
@@ -142,65 +181,94 @@ public static float[] ParseViewBox(ISvgNodeRenderer svgRenderer) {
         }
 
         /// <summary>
-        /// Extract width and height of the passed SVGNodeRenderer,
-        /// defaulting to respective viewbox values if either one is not present or
-        /// to browser default if viewbox is missing as well.
+        /// Extract width and height of the passed SVGNodeRenderer, defaulting to
+        /// <see cref="iText.Svg.Renderers.SvgDrawContext.GetCustomViewport()"/>
+        /// if either one is not present.
         /// </summary>
+        /// <remarks>
+        /// Extract width and height of the passed SVGNodeRenderer, defaulting to
+        /// <see cref="iText.Svg.Renderers.SvgDrawContext.GetCustomViewport()"/>
+        /// if either one is not present. If
+        /// <see cref="iText.Svg.Renderers.SvgDrawContext.GetCustomViewport()"/>
+        /// isn't specified, than respective
+        /// viewbox values or browser default (if viewbox is missing) will be used.
+        /// </remarks>
         /// <param name="svgRenderer">
         /// the
         /// <see cref="iText.Svg.Renderers.ISvgNodeRenderer"/>
-        /// instance that contains
-        /// the renderer tree
+        /// instance that contains the renderer tree
         /// </param>
         /// <param name="em">em value in pt</param>
-        /// <param name="rem">rem value in pt</param>
-        /// <returns>Rectangle, where x,y = 0 and width and height are extracted ones by this method.</returns>
-        public static Rectangle ExtractWidthAndHeight(ISvgNodeRenderer svgRenderer, float em, float rem) {
-            float[] values = iText.Svg.Utils.SvgCssUtils.ParseViewBox(svgRenderer);
-            float defaultWidth = values == null ? CssDimensionParsingUtils.ParseAbsoluteLength(SvgConstants.Values.DEFAULT_VIEWBOX_WIDTH
-                ) : values[2];
-            float defaultHeight = values == null ? CssDimensionParsingUtils.ParseAbsoluteLength(SvgConstants.Values.DEFAULT_VIEWBOX_HEIGHT
-                ) : values[3];
-            Rectangle result = new Rectangle(defaultWidth, defaultHeight);
-            String width = svgRenderer.GetAttribute(SvgConstants.Attributes.WIDTH);
-            if (CssTypesValidationUtils.IsRemValue(width)) {
-                result.SetWidth(CssDimensionParsingUtils.ParseRelativeValue(width, rem));
-            }
-            else {
-                if (CssTypesValidationUtils.IsEmValue(width)) {
-                    result.SetWidth(CssDimensionParsingUtils.ParseRelativeValue(width, em));
+        /// <param name="context">the svg draw context</param>
+        /// <returns>rectangle, where x,y = 0 and width and height are extracted ones by this method.</returns>
+        public static Rectangle ExtractWidthAndHeight(ISvgNodeRenderer svgRenderer, float em, SvgDrawContext context
+            ) {
+            float finalWidth = 0;
+            float finalHeight = 0;
+            float percentHorizontalBase;
+            float percentVerticalBase;
+            // Here we follow https://svgwg.org/specs/integration/#svg-css-sizing with one exception:
+            // we use author specified width and height (SvgDrawContext#customViewport)
+            // in any case regardless viewbox existing (it is how browsers work).
+            if (context.GetCustomViewport() == null) {
+                float[] viewBox = iText.Svg.Utils.SvgCssUtils.ParseViewBox(svgRenderer);
+                if (viewBox == null) {
+                    percentHorizontalBase = CssDimensionParsingUtils.ParseAbsoluteLength(SvgConstants.Values.DEFAULT_VIEWPORT_WIDTH
+                        );
+                    percentVerticalBase = CssDimensionParsingUtils.ParseAbsoluteLength(SvgConstants.Values.DEFAULT_VIEWPORT_HEIGHT
+                        );
                 }
                 else {
-                    if (width != null) {
-                        result.SetWidth(CssDimensionParsingUtils.ParseAbsoluteLength(width));
-                    }
-                    else {
-                        if (values == null) {
-                            LOGGER.LogWarning(SvgLogMessageConstant.MISSING_WIDTH);
-                        }
-                    }
+                    percentHorizontalBase = viewBox[2];
+                    percentVerticalBase = viewBox[3];
                 }
             }
+            else {
+                percentHorizontalBase = context.GetCustomViewport().GetWidth();
+                percentVerticalBase = context.GetCustomViewport().GetHeight();
+            }
+            float rem = context.GetCssContext().GetRootFontSize();
+            String width = svgRenderer.GetAttribute(SvgConstants.Attributes.WIDTH);
+            finalWidth = CalculateFinalSvgRendererLength(width, em, rem, percentHorizontalBase);
             String height = svgRenderer.GetAttribute(SvgConstants.Attributes.HEIGHT);
-            if (CssTypesValidationUtils.IsRemValue(height)) {
-                result.SetHeight(CssDimensionParsingUtils.ParseRelativeValue(height, rem));
+            finalHeight = CalculateFinalSvgRendererLength(height, em, rem, percentVerticalBase);
+            return new Rectangle(finalWidth, finalHeight);
+        }
+
+        private static float CalculateFinalSvgRendererLength(String length, float em, float rem, float percentBase
+            ) {
+            if (length == null) {
+                length = SvgConstants.Values.DEFAULT_WIDTH_AND_HEIGHT_VALUE;
+            }
+            if (CssTypesValidationUtils.IsRemValue(length)) {
+                return CssDimensionParsingUtils.ParseRelativeValue(length, rem);
             }
             else {
-                if (CssTypesValidationUtils.IsEmValue(height)) {
-                    result.SetHeight(CssDimensionParsingUtils.ParseRelativeValue(height, em));
+                if (CssTypesValidationUtils.IsEmValue(length)) {
+                    return CssDimensionParsingUtils.ParseRelativeValue(length, em);
                 }
                 else {
-                    if (height != null) {
-                        result.SetHeight(CssDimensionParsingUtils.ParseAbsoluteLength(height));
+                    if (CssTypesValidationUtils.IsPercentageValue(length)) {
+                        return CssDimensionParsingUtils.ParseRelativeValue(length, percentBase);
                     }
                     else {
-                        if (values == null) {
-                            LOGGER.LogWarning(SvgLogMessageConstant.MISSING_HEIGHT);
-                        }
+                        return CssDimensionParsingUtils.ParseAbsoluteLength(length);
                     }
                 }
             }
-            return result;
+        }
+
+        private static float CalculatePercentBaseValueIfNeeded(AbstractSvgNodeRenderer svgNodeRenderer, SvgDrawContext
+             context, String length, bool isXAxis) {
+            float percentBaseValue = 0.0F;
+            if (CssTypesValidationUtils.IsPercentageValue(length)) {
+                Rectangle viewBox = svgNodeRenderer.GetCurrentViewBox(context);
+                if (viewBox == null) {
+                    throw new SvgProcessingException(SvgExceptionMessageConstant.ILLEGAL_RELATIVE_VALUE_NO_VIEWPORT_IS_SET);
+                }
+                percentBaseValue = isXAxis ? viewBox.GetWidth() : viewBox.GetHeight();
+            }
+            return percentBaseValue;
         }
     }
 }
diff --git a/port-hash b/port-hash
index 557d64e7b2..45644bb10c 100644
--- a/port-hash
+++ b/port-hash
@@ -1 +1 @@
-ac38ed196978d1f68d38ccdfc1c58c4dbee26302
+81e947664c0e8cd96bb236ddbfb88205bdcc0243