The standard RM attributes for composition and entry classes include the subject and participations in all of them. When we model templates(for 1.4 OPTs), the entry archetypes always goes inside a composition(such as encounter). In a template with more than one entry archetypes, while the participations could be different for the encounter and the entries, the subject is always the same.
What is the recommended practice in recording the subject? do we do it at the composition level or at the level of each entry? Does either approach have any implication while using AQL?
Also in the 2.0 OPTs, as I understand, any entry archetype can be specialized as a template and do not need a composition holder. If that is the case, do the standards RM attributes for entry get extended to include the missing composition RM attributes (author, healthcare facility, event start time etc) when they are specialized into a template?