Merge pull request #431 from w3c/update-readme

Updated readme

README.md

@@ -1,12 +1,45 @@
 
 ![W3C Logo](https://www.w3.org/Icons/w3c_home)
 
-# Accessibility Discussions of the Publishing@W3C Groups
+# Publishing Accessibility Task Force
 
-This is the repository for the Accessibility related discussions of the [Publishing@W3C Groups](https://www.w3.org/publishing/). 
+This is the repository for the Accessibility Task Force of the Publishing Community Group.
 
 [Minutes of the task force meetings](https://github.com/w3c/publ-a11y/wiki/Minutes-of-Publishing-CG-Accessibility-Task-Force-Meetings)
 
+## Participation
+
+To join the task force, please first become a member of the [Publishing Community Group](https://www.w3.org/community/publishingcg/).
+
+Task force meetings are announced on the community group's public mailing list. All members are welcome to join.
+
+## Documents
+
+The Accessibility Task Force maintains the following documents in this repository:
+
+- Accessibility Metadata Display Guide for Digital Publications
+  - [Editor's Draft](https://w3c.github.io/publ-a11y/UX-Guide-Metadata/draft/principles/)
+  - [Latest Version](https://www.w3.org/2021/09/UX-Guide-metadata-1.0/principles/)
+  - EPUB Techniques
+    - [Editor's Draft](https://w3c.github.io/publ-a11y/UX-Guide-Metadata/draft/techniques/epub-metadata/)
+    - [Latest Version](https://www.w3.org/publishing/a11y/UX-Guide-metadata/techniques/epub-metadata/)
+  - ONIX Techniques
+    - [Editor's Draft](https://w3c.github.io/publ-a11y/UX-Guide-Metadata/draft/techniques/onix-metadata/)
+    - [Latest Version](https://www.w3.org/publishing/a11y/UX-Guide-metadata/techniques/onix-metadata/)
+- Accessibility Properties Crosswalk
+  - [Editor's Draft](https://w3c.github.io/publ-a11y/drafts/a11y-crosswalk-MARC/)
+- Publishing Guide to Audio Playback and Text-To-Speech
+  - [Editor's Draft](https://w3c.github.io/publ-a11y/drafts/audio-playback/)
+  - [Latest Version](https://www.w3.org/publishing/a11y/audio-playback/)
+- Page Source Identification
+  - [Editor's Draft](https://w3c.github.io/publ-a11y/drafts/page-source-id/)
+  - [Latest Version](https://www.w3.org/publishing/a11y/page-source-id/)
+- Accessibility Summary Authoring Guidelines for EPUB Publications
+  - [Editor's Draft](https://w3c.github.io/publ-a11y/drafts/schema-a11y-summary/)
+  - [Latest Version](https://www.w3.org/publishing/a11y/schema-a11y-summary/)
+- Zero-Tolerance Accessibility Conformance Approaches for Publishing
+  - [Editor's Draft](https://w3c.github.io/publ-a11y/drafts/zero-tolerance-conformance/)
+
 ## Contributing to the Repository
 
 Use the standard fork, branch, and pull request workflow to propose changes to the specification. Please make branch names informative—by including the issue or bug number for example.