The Archetype Query Lanaguage (AQL) is a proposed query specification for openEHR data developed by Ocean Informatics.
Dr. Chunlan Ma
Heath Frankel
Thomas Beale
Archetype Query Language Description
References:
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]