Issues

Upgrade grammar to ANTLR4

Support for XOR operator

Add support for a few other functions

Add support for GROUP BY, HAVING and DISTINCT

Support for querying across LINKs or references

Add support for aggregate functions (COUNT, SUM, etc)

AQL query processor should ignore data with lifecycle_state = incomplete.

Improve introductory text

Add support for proper terminology access to AQL

Clarify TIMEWINDOW semantics

Clarify major keyword documentation and semantics; remove TIMEWINDOW.

Clarify use of terminology 'identified path'

Add support for descendant paths

Support for LIKE operator

Add support for LIMIT and OFFSET

Add clarifications and fix typographical errors

Correct typographical errors

Describe how AQL works with openEHR demographic data

Improve terminology support

Add namespaces to AQL

Add function support to AQL

Add description of cartesian product problem.

Improve readability and clean up text

Add support for NOT CONTAINS