diff --git a/specifications/xpath-functions-40/src/function-catalog.xml b/specifications/xpath-functions-40/src/function-catalog.xml
index 9ffcff85d..2f3ec5e66 100644
--- a/specifications/xpath-functions-40/src/function-catalog.xml
+++ b/specifications/xpath-functions-40/src/function-catalog.xml
@@ -5369,15 +5369,17 @@ return normalize-unicode(concat($v1, $v2))</eg>
                      the value through <code>fn:upper-case(fn:normalize-space())</code>. </p>
                   <p>Conforming implementations <rfc2119>must</rfc2119> support the following
                      options and the functions referred to by them:</p>
-                  <ulist>
+                  <ulist> 
                      <item><p><code>MD5</code>: the MD5 Message-Digest algorithm defined by <bibref
                         ref="rfc6151"/> (update to <bibref ref="rfc1321"/>).</p></item>
-                     <item><p><code>SHA-1</code>: the <code>SHA-1</code> algorithm, defined by <bibref
+					 <item><p><code>BLAKE3</code>: the <code>BLAKE3</code> algorithm defined by <bibref 
+					    ref="BLAKE3"/>.</p></item>
+                     <item><p><code>CRC-32</code>: the <code>CRC-32</code> algorithm, defined by <bibref
+                        ref="ieee802-3"/>. </p></item>
+					<item><p><code>SHA-1</code>: the <code>SHA-1</code> algorithm, defined by <bibref
                         ref="fips180-4"/>. </p></item>
                      <item><p><code>SHA-256</code>: the <code>SHA-256</code> algorithm, defined by <bibref
                         ref="fips180-4"/>. </p></item>
-                     <item><p><code>CRC-32</code>: the <code>CRC-32</code> algorithm, defined by <bibref
-                        ref="ieee802-3"/>. </p></item>
                   </ulist>
                   <p>Conforming implementations <rfc2119>may</rfc2119> support other checksum and
                            hash functions with implementation-defined semantics.</p>
@@ -5393,9 +5395,18 @@ return normalize-unicode(concat($v1, $v2))</eg>
       </fos:errors>
       <fos:notes>
          <p>It is common for secure algorithms to be cryptographically broken, as has happened to
-            the algorithms <code>MD5</code> and <code>SHA-1</code>. Developers are responsible for
+            the algorithms <code>MD5</code>, <code>SHA-1</code>, and <code>SHA-256</code>. 
+			And the <code>CRC-32</code> algorithm is not intended for cryptographic purposes. 
+			Developers are responsible for
             ensuring that the algorithm chosen meets any expected security protocols, if
             relevant.</p>
+		<p>The <code>BLAKE3</code> algorithm is included in the list of hashing algorithms 
+		because at the time of writing it appears to be a promising candidate as a secure and fast algorithm 
+		that shows signs of gaining widespread support. 
+		However, this is a fast moving field and the community group recognizes that this decision might eventually not stand the test of time. 
+		As the technology evolves in the future, implementations are free to drop support for this algorithm and substitute another 
+		that appears to better meet requirements.
+		</p>
          <p>Additional security practices, such as salting, may be applied as a preprocessing step,
             or <code>fn:hash()</code> can be incorporated into more complex functions.</p>
          <p>In most cases, the <code>xs:hexBinary</code> output of the function will be sought in
@@ -5424,6 +5435,19 @@ return normalize-unicode(concat($v1, $v2))</eg>
                <fos:result>xs:hexBinary("3C01BDBB26F358BAB27F267924AA2C9A03FCFDB8")</fos:result>
             </fos:test>
             <fos:test>
+               <fos:expression><eg>hash("ABC", { "algorithm": "BLAKE3" }) 
+=> string() => lower-case()</eg></fos:expression>
+               <fos:result>"d1717274597cf0289694f75d96d444b992a096f1afd8e7bbfa6ebb1d360fedfc"</fos:result>
+            </fos:test>
+            <fos:test>
+               <fos:expression><eg>hash("ABC", { "algorithm": "BLAKE3" }) 
+=> xs:base64Binary() => string()</eg></fos:expression>
+               <fos:result>"0XFydFl88CiWlPddltREuZKglvGv2Oe7+m67HTYP7fw="</fos:result>
+            </fos:test>
+            <fos:test>
+               <fos:expression><eg>hash("ABC", { "algorithm": "sha-256" })
+=> string()</eg></fos:expression>
+               <fos:result>"B5D4045C3F466FA91FE2CC6ABE79232A1A57CDF104F7A26E716E0A1E2789DF78"</fos:result>
                <fos:expression><eg>hash("ABC", { "algorithm": "sha-256" })</eg></fos:expression>
                <fos:result>xs:hexBinary("B5D4045C3F466FA91FE2CC6ABE79232A1A57CDF104F7A26E716E0A1E2789DF78")</fos:result>
             </fos:test>
@@ -5433,7 +5457,7 @@ return normalize-unicode(concat($v1, $v2))</eg>
             </fos:test>
             <fos:test use="v-hash-doc">
                <fos:expression><eg>hash(serialize($doc), { "algorithm": "sha-1" }) 
-=> xs:base64Binary()     
+=> xs:base64Binary()   
 => string()</eg></fos:expression>
                <fos:result>"8PzN28NtxQv5RlxQ5/w6DcnrpEU="</fos:result>
             </fos:test>
@@ -32174,4 +32198,4 @@ return pin($data)??languages[. = 'German'] ! label()?path()[1]</eg></fos:express
       </fos:changes>
    </fos:function>
    
-</fos:functions>
+</fos:functions>
\ No newline at end of file
diff --git a/specifications/xpath-functions-40/src/xpath-functions.xml b/specifications/xpath-functions-40/src/xpath-functions.xml
index 2b51e883b..feb03d4fc 100644
--- a/specifications/xpath-functions-40/src/xpath-functions.xml
+++ b/specifications/xpath-functions-40/src/xpath-functions.xml
@@ -11197,6 +11197,10 @@ currently, Version 9.0.0.
          <div2 id="non-normative-biblio">
             <head>Non-normative references</head>
             <blist>
+			   <bibl id="BLAKE3" key="BLAKE3 Hashing">
+				  <emph>Blake3 Algorithm Specification</emph>. Available at:
+				  <loc href="https://github.com/BLAKE3-team/BLAKE3-specs/blob/master/blake3.pdf">https://github.com/BLAKE3-team/BLAKE3-specs/blob/master/blake3.pdf</loc>
+			   </bibl>			
                <bibl  id="CALCALC"
                      key="Calendrical Calculations">Edward M. Reingold and Nachum Dershowitz.
 <emph>Calendrical Calculations Millennium edition (2nd Edition)</emph>. Cambridge University Press,