Lets try to build a simple JSONiq query processor

The spec is here: http://www.jsoniq.org/

The plan:

1. Build ANTLR grammar, publish it on the ANTLR site
2. Build a prototype processor in Python3 w/o any XQuery functions or advanced operations
3. Build a Java or Scala processor
4. Add in functions from SAXON
5. Add schema features

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Current status: Basic grammar working, except for update syntax and comment syntax

Project is discontinued, all efforts shifter towards pythonql