Body:
| (Description, FormalExpression*, Alias*) |
Attributes:
Contained in:
A ConditionDef defines a boolean condition. The Description element must be provided and should include a prose description. This is the normative content of the ConditionDef. The ConditionDef is referenced by the CollectionExceptionConditionOID attribute within a study metadata component which may be omitted under circumstances defined by the condition, i.e., when the FormalExpression evaluates to True.
If a FormalExpression is provided, it must contain a machine-readable expression that will evaluate to True or False. Multiple FormalExpressions can be provided if each has a different Context attribute, allowing the same expression to be represented in forms appropriate to multiple systems.
If an application cannot interpret any of the FormalExpressions or does not normally support conditional data collection, data for the referencing study metadata component should be collected as though no Condition is specified.