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Parent Package: entry
Class ISM_TRANSITION

PATHABLE
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   +--ISM_TRANSITION
Model of a transition in the Instruction State machine, caused by a careflow step. The attributes document the careflow step as well as the ISM transition.

Attributes
Signature	Optionality	Multiplicity	Constant	Documentation
careflow_step : DV_CODED_TEXT	0..1	--		The step in the careflow process which occurred as part of generating this action, e.g. “dispense”, “start_administration”. This attribute represents the clinical label for the activity, as opposed to current_state which represents the state machine (ISM) computable form. Defined in archetype.
current_state : DV_CODED_TEXT	1	--		The ISM current state. Coded by openEHR terminology group “Instruction states”.
transition : DV_CODED_TEXT	0..1	--		The ISM transition which occurred to arrive in the current_state. Coded by openEHR terminology, group “ISM transitions”.

Constraints
Name	Expression
Current_state_valid	inv: current_state <> Void and terminology(Terminology_id_openehr). has_code_for_group_id(Group_id_ism_states, current_state.defining_code)
Transition_valid	inv: transition <> Void implies terminology(Terminology_id_openehr). has_code_for_group_id(Group_id_ism_transitions, transition.defining_code)