Archetype Query Language Examples DEVELOPMENT

Annotated AQL query examples covering common clinical retrieval patterns across EHR, Composition, Entry, and demographic contexts. Intended as a practical complement to the formal AQL specification. Examples range from simple single-archetype retrievals to complex multi-entry queries with joins, aggregations, and parameter substitution. Each example is accompanied by narrative explaining the clinical intent, the data model being queried, and notes on expected result sets.

Purpose

This document documents examples of use of the openEHR Archetype Query Language (AQL).

Feedback

Feedback may be provided on the openEHR AQL forum.

Issues may be raised on the specifications Problem Report tracker.

To see changes made due to previously reported issues, see the QUERY component Change Request tracker.