openEHR RM times and tracking clinical process

There is a rich context model in openEHR (see specifications). Timing is part of this and is summarised below with some sample use cases. Other times must be explicitly archetyped.

RM Class	Attribute	Description	Lab request/referral	Lab result	Encounter	Consultant report
CONTRIBUTION	time	Time composition(s) were added to this system. Equals COMPOSITION commit time with locally authored compositions	Request received locally	Report received locally	Record received locally	Report received locally
COMPOSITION	Commit time (mandatory)	Time composition is saved in original system	Request sent	Report issued	Note recorded	Report issued
(Event related compositions)	EVENT CONTEXT.Start time (mandatory)	The time (or start time) of the event or process	Request created/recorded	Report created/recorded	Patient encounter begins	Report created/recorded (may relate to patient encounter if done at time of seeing patient)
	EVENT CONTEXT.End time (optional)	End time of the event or process	Not usually recorded	Not usually recorded	End time of the encounter	Not usually recorded unless at the same time as an encounter
PARTICIPATION	Start time/End time	The time that a person took a role that has been recorded	Duration of other participants' functions	Duration of other participants' functions	Duration of other participants' functions	Duration of other participants' functions
ATTESTATION	Time	The time this COMPOSITION or part thereof was signed	Time of signing the request/referral or any part thereof	Time of clinician or technician signing the report or any part thereof	Time of signing the encounter note or any part thereof	Time of signing the encounter note or any part thereof
OBSERVATION	EVENT.Start time	The clinically relevant time of the observation	N/A	Time the sample was collected	Time of the observation	Time of the observation
ACTION	Time	The time this action was completed	Time of the action * Order effective date/time (on the order set) * Quantity/timing start date/time (same as Date/time requested on the order item) * Specimen received date/time	Time of the action * Order effective date/time (on the order set) * Result report/status change date/time (on the order item - the date/time the order item status changed, or it could also be 'Report created/recorded' - the date/time the results are composed into a report and released) * Quantity/timing start date/time (same as Date/time requested on the order item) * Date/time of observation (same as observation EVENT.Start time) * Specimen received date/time	Time of this action	Time of this action
INSTRUCTION	expiry time		Time this request/referral expires	Time this request/referral expires