diff --git a/imsc1/spec/substantive-changes-summary.txt b/imsc1/spec/substantive-changes-summary.txt
new file mode 100644
index 00000000..9b2e36d7
--- /dev/null
+++ b/imsc1/spec/substantive-changes-summary.txt
@@ -0,0 +1,53 @@
+**********************************
+*                                *
+* Summary of substantive changes *
+*                                *
+**********************************
+
+
+NOTE 1: This summary is provided for illustration only. For an exhaustive list of changes, please
+refer to the changesets at https://github.com/w3c/imsc or use the W3C diff tool at
+http://services.w3.org/htmldiff across published versions of the specification.
+
+NOTE 2: Issues and their dispositions are documented at https://github.com/w3c/imsc/issues
+
+
+From WD (20171017)
+==================
+
+* Clarify the use of recommended character sets (#236)
+
+* Update feature list per TTML2 CR (#341)
+
+* Refactor profile signaling provisions (#331)
+
+* Remove recommendation against TAB characters per TTML2 semantics (#353)
+
+* Clarify fillLineGap semantics when applied to successive <p> elements (#263)
+
+* Clarify forcedDisplay semantics (#284)
+
+* Clarify handling of foreign elements and attributes (#213)
+
+* Clarify style resolution procedure (#300)
+
+* Remove recommendations on time expressions and ttp:cellResolution (#329)
+
+* Remove ttp:version and fix examples (#261)
+
+* Prohibit simultaneous tts:origin and tts:position (#289)
+
+* Remove background-color feature per removal in TTML2 (#255)
+
+* Remove rubyOverhang related features (#286 and #285)
+
+* Deprecate ittp:aspectRatio in favor of ttp:displayAspectRatio (#273)
+
+* Deprecate ittm:altText in favor of altText named metadata item (#274)
+
+* Deprecate #progressivelyDecodable (#272) 
+
+* Deprecates #writingMode-horizontal-rl in Image Profile (#147)
+
+* Updated profile signaling and resolution to match TTML2 semantics (#3, #124 and #125)
+
diff --git a/imsc1/spec/ttml-ww-profiles.html b/imsc1/spec/ttml-ww-profiles.html
index fcf514dd..81d2e77a 100644
--- a/imsc1/spec/ttml-ww-profiles.html
+++ b/imsc1/spec/ttml-ww-profiles.html
@@ -9,15 +9,15 @@
 </script>
   <script class='remove'>
 var respecConfig = {
-                    specStatus:   "ED"
+                    specStatus:   "CR"
                 ,   processVersion: "2018"
-                /*,   previousMaturity: "WD"*/
-                ,   publishDate: "2017-10-17"
-                /*,   crEnd: "2017-08-13"*/
+                ,   previousMaturity: "WD"
+                ,   publishDate: "2018-05-03"
+                ,   crEnd: "2018-05-31"
                 /*,   errata: "http://www.w3.org/2016/04/ttml-imsc1-errata.html"*/
-                /*,   implementationReportURI: "https://www.w3.org/wiki/TimedText/IMSC1_0_1_Implementation_Report"*/
+                ,   implementationReportURI: "https://www.w3.org/wiki/TimedText/IMSC1_1_Implementation_Report"
                 ,   sotdAfterWGinfo: "true"
-                /*,   previousPublishDate: "2017-03-22"*/
+                ,   previousPublishDate: "2017-10-17"
                 ,   shortName:    "ttml-imsc1.1"
                 ,   otherLinks: [{
                           key: 'Latest IMSC1 recommendation',
@@ -36,14 +36,15 @@
                   ,   wgPatentURI: "https://www.w3.org/2004/01/pp-impl/34314/status"
                   ,   subjectPrefix: "[imsc1.1]"
                   ,   edDraftURI: "https://rawgit.com/w3c/imsc/IMSC1.1/imsc1/spec/ttml-ww-profiles.html"
+                  ,   github: "https://github.com/w3c/imsc"
                   ,   license: "w3c"
                   ,   localBiblio:  {
                                   "SUBM": "World Wide Web Consortium (W3C). <a href='https://www.w3.org/Submission/2013/SUBM-ttml-ww-profiles-20130607/'>TTML Text and Image Profiles for Internet Media Subtitles and Captions</a> (Member Submission, 07 June 2013)",
-                  "CEA-608": "Consumer Technology Association. <a href='http://www.techstreet.com/standards/cta-608-e-r2014?product_id=1815447'>CTA 608-E, Line-21 Data Services</a>.",
-                  "CEA-708": "Consumer Technology Association. <a href='http://www.techstreet.com/standards/cta-708-d?product_id=1815448'>CTA 708-D, Digital Television (DTV) Closed Captioning</a>.",
-                  "CFF": "Digital Entertainment Content Ecosystem (DECE). <a href='http://www.uvcentral.com/specs'>Common File Format & Media Formats Specification (CFF) Version 2.2</a>.",
+                  "CEA-608": "Consumer Technology Association. <a href='https://www.techstreet.com/standards/cta-608-e-r2014?product_id=1815447'>CTA 608-E, Line-21 Data Services</a>.",
+                  "CEA-708": "Consumer Technology Association. <a href='https://www.techstreet.com/standards/cta-708-d?product_id=1815448'>CTA 708-D, Digital Television (DTV) Closed Captioning</a>.",
+                  "CFF": "Digital Entertainment Content Ecosystem (DECE). <a href='https://www.uvcentral.com/specs'>Common File Format & Media Formats Specification (CFF) Version 2.2</a>.",
                                   "EBU-TT-D": "European Broadcasting Union (EBU). <a href='https://tech.ebu.ch/docs/tech/tech3380.pdf'>Tech 3380, EBU-TT-D Subtitling Distribution Format Version 1.0.1</a>",
-                                  "EBU-TT-M": "European Broadcasting Union (EBU). <a href='https://tech.ebu.ch/docs/tech/tech3390.pdf'>Tech 3390, EBU-TT-M Metadata Definitions 1.0/a>",
+                                  "EBU-TT-M": "European Broadcasting Union (EBU). <a href='https://tech.ebu.ch/docs/tech/tech3390.pdf'>Tech 3390, EBU-TT-M Metadata Definitions 1.0</a>",
                                   "CLDR": "Unicode Consortium. <a href='http://cldr.unicode.org'>The Common Locale Data Repository Project</a>"
               }
         };
@@ -91,7 +92,17 @@
     <p>Both profiles are based on [[SUBM]].</p>
   </section>
 
-  <section id='sotd'></section>
+  <section id='sotd'>
+    <p>For this specification to exit the CR stage, at least 2 independent implementations of every feature defined in this
+    specification but not already present in either [[TTML2]] or [[ttml-imsc1.0.1]] need to be documented in the implementation
+    report. The Working Group does not require that implementations are publicly available but encourages them to be so.</p>
+
+    <p>The Working Group has not identified features "at risk" for this specification.</p>
+
+    <p>A list of the substantive changes applied since the <a href="https://www.w3.org/TR/2017/WD-ttml-imsc1.1-20171017/">initial
+    Working Draft</a> is found at <a href="substantive-changes-summary.txt">substantive-changes-summary.txt</a>. For convenience, a
+    diff is offered at the <a href="https://www.w3.org/TR/2018/CR-ttml-imsc1.1-20180503/">W3C HTML Diff service</a>.</p>
+  </section>
 
   <section id='scope'>
     <h2>Scope</h2>