README.md: Updated with links to the published standard

Author: jerstlouis

README.md

@@ -1,20 +1,26 @@
-# Revision of the OGC Two Dimensional Tile Matrix Set
+# OGC Two Dimensional Tile Matrix Set and Tileset Metadata
 
-Latest draft standard: [HTML](https://docs.opengeospatial.org/DRAFTS/17-083r4.html) [PDF](https://docs.opengeospatial.org/DRAFTS/17-083r4.pdf)
+Latest published **version 2.0** of the OGC Two Dimensional Tile Matrix Set and Tileset Metadata standard: [HTML](https://docs.ogc.org/is/17-083r4/17-083r4.html) [PDF](https://docs.ogc.org/is/17-083r4/17-083r4.pdf)
 
-This GitHub repository contains the draft content for the revision of the OGC 17-083r2 Two Dimensional Tile Matrix Set standard.
+Latest release notes: [HTML](https://docs.ogc.org/is/17-083r4/21-066r1.html) [PDF](https://docs.ogc.org/is/17-083r4/21-066r1.pdf)
 
-Last version of the release notes document: [HTML](https://docs.opengeospatial.org/DRAFTS/21-066r1.html) [PDF](https://docs.opengeospatial.org/DRAFTS/21-066r1.pdf)
+This standard defines the models and encodings for the Tile Matrix Sets and Tileset metadata of [_OGC API - Tiles_](https://docs.ogc.org/is/20-057/20-057.html).
 
-The repo is organized as follows:
+Before becoming an independent OGC standard, the original concepts were used in the [OGC Web Map Tile Service (WMTS)](https://portal.ogc.org/files/?artifact_id=35326) and [OGC GeoPackage](https://www.geopackage.org/spec131/index.html).
+
+The main new capabilities of this independent standard are:
+
+- the concept of common Tile Matrix Sets that can be registered e.g., in the [OGC Tile Matrix Set Register](http://www.opengis.net/def/tms), re-used and easily recognized by URI,
+- support for [variable width tile matrices](https://docs.ogc.org/is/17-083r4/17-083r4.html#toc57) to better accommodate polar regions of Tile Matrix Sets defined in a geographic CRS,
+- a new service-independent [tileset metadata model](https://docs.ogc.org/is/17-083r4/17-083r4.html#toc20) and [encodings](https://docs.ogc.org/is/17-083r4/17-083r4.html#toc23), including the ability to describe schemas for component data layers of tiles of vector features or coverage data,
+- a [JSON encoding](https://docs.ogc.org/is/17-083r4/17-083r4.html#toc18) of Tile Matrix Set definitions.
 
-* index.adoc - nothing in this document
-  - this is the only part needed to create a standard
-  * standard - the main standard document content
-  - organized in multiple sections and directories
-* release_notes - the differences and improvements between the proposed version (OGC 17-083r4) and the OGC 17-083r2
-  - organized in multiple sections and directories
-* schemas - XML and JSON Schemas and examples for OGC 17-083r4
-* uml - The UML models used in the standard in EAP format.
+This GitHub repository contains the draft content for a future revision or corrigendum of the standard.
+
+The repo is organized as follows:
 
-There are several issues collected since the publication of the standard that will be solved. The process is done in parallel with the OGC API - Tiles - Part 1: https://github.com/opengeospatial/ogcapi-tiles
+* [**registry/**](registry/) - The authoritative source of the [OGC Tile Matrix Set Register](http://www.opengis.net/def/tms), maintained by the _OGC API - Tiles_ Standard Working Group
+* [**release_notes/**](release_notes/) - the differences and improvements between versions 2.0 (OGC 17-083r4) and 1.0 (OGC 17-083r2)
+* [**schemas/**](schemas/) - XML and JSON Schemas and examples for TileMatrixSet definitions and Tileset Metadata
+* [**standard/**](standard/) - the main standard document content
+* [**standard/uml/**](standard/UML/) - The UML models used in the standard in EAP format.