Improve EVENT_CONTEXT modelling

Description

The EVENT_CONTEXT class needs some adjustments to better
correspond to the reality it models. Firstly, 'author' should be
renamed to 'composer', to correspond with the emerging CEN
ENV13606 standard.

Secondly, the health_care_facility attribute should be optional,
since a care event could occur at the patient's home, with no
involvement at all by a care delivery enterprise (e.g. creation
of some observations; self-administration of a drug).

Assignee

JeffJ

Reporter

JeffJ

Raised By

None

Priority

Trivial
Configure