The SYSTEM type
Introduction
See https://openehr.atlassian.net/wiki/spaces/spec/pages/94243566
This is not yet an openEHR type, although is assumed in few places in openEHR specifications: EHR.system_id, VERSIONED_OBJECT.owner_id and in OBJECT_VERSION_ID.creating_system_id.
Specifications
We consider the SYSTEM type should inherit from LOCATABLE and have following extra attributes:
location (DV_URI)
details (ITEM_STRUCTURE)