Update README.md

README.md

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 # basex-xqparse
-EBNF grammar to parse BaseX XQuery sources using REx
+EBNF grammars for BaseX XQuery sources 
 
-##  railroad  diagrams
-https://github.com/GuntherRademacher/rr
+These can be used with tools like Gunther Rademacher's https://www.bottlecaps.de/rex/ to generate source to parse XQuery code.
+## Applications
+Code generated from these EBNFs is used in:
+* https://github.com/Quodatum/xqlint
+* https://github.com/Quodatum/xqdoca
+* https://github.com/Quodatum/vscode-basex
+## Documentation 
+railroad  diagrams for the EBNFs were generated using https://github.com/GuntherRademacher/rr