The Archetype Query Lanaguage (AQL) is a proposed query specification for openEHR data developed by Ocean Informatics.
Dr. Chunlan Ma
It is possible for more than one grammar to support the same syntax. The following are the grammars currently available.
'Original' AQL grammar
Contains some non left-recursive constructs, preventing direct use by LL parsers.
Marand, contact: Bostjan Lah
Built from 'Original' AQL grammar by Ocean Informatics
Dynamic Generation of Archetype-Based User Interfaces for Queries on Electronic Health Record Databases
Shelly Sachdeva, Daigo Yaginuma, Wanming Chu, and Subhash Bhalla
Graduate Department of Computer and Information Systems, University of Aizu, Fukushima, Japan