A ConditionDef defines a boolean condition.
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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.
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