+ document branches

README.md

@@ -13,5 +13,25 @@ It contains links to:
 - [Public ShEx mailing list](mailto:public-shex@w3.org) ([archive](https://lists.w3.org/Archives/Public/public-shex/))
 - [ShEx community group](https://www.w3.org/community/shex/)
 
+## Branches
 
+The following branches are in play (or …pending or ☠deletable) in shexSpec:
 
+branch | repos | use
+-- | -- | --
+**master** | shexTest, shex.js, …spec | approved stuff for ShEx.next
+├**new_spec** | shexTest | stratified negation violations
+├┐**shapesMap** | …shexTest, …shex.js, …spec | exploit new JSON-LD 1.1 ability to have `shapes` be a map
+│└**simpleRef** | shexTest, …shex.js, …spec | simplify grammar to allow simple references, e.g. `<S1> @<S2>`
+├**tcParens** | ☠shexTest | allow ()s around TripleConstraint
+├**LanguageTag-data-case** | shexTest | variations in data language-tag case
+├**LanguageTag-schema-case** | shexTest | variations in schema language-tag case
+├**langString-ATstar** | shexTest | empty language stem e.g. `[@~]` or `[@~ - @fr-be~]`
+├**accessors** | shexTest, shex.js | language extension to compare against paths and test uniqueness constraints
+├**negation** | shexTest, shex.js | language extension to test `!<p1> .` against graph (not neighborhood)
+├──┐**backtick** | shex.js | look for entities with corresponding label
+├─┐│**remoteQuery** | shex.js | execute validation queries via SPARQL
+├┐││**worker** | shex.js | execute validation in Web Worker
+│└└└**wikidata** | shex.js | combines 
+├**2.0** | shexTest | state of tests for ShEx 2.0 release
+└**ShEx1** | shexTest | archive of ShEx 1 tests