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?:definition
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A relationship between an activity and some criteria to determine if the activity should occur where all activities are part of the global library of activities. EXAMPLE(S): Only perform a certain lab test if drug X was administered. (target = another activity) Only perform a substance administration of drug X if the blood pressure was over some threshold number. (target = observation result from another activity that is an observation) Only perform a substance administration of drug Y if the blood pressure was over some threshold number and either the result of a certain lab test was positive or the subject\'s temperature was elevated, i.e. \'(A and (B or C))\'. OTHER NAME(S): NOTE(S): The criteria to evaluate the relationship could be one of the following: - the outcome of another activity where the source activity does not occur unless the target activity outcome has occurred - another activity where the source activity does not occur unless the target activity has occurred - a group of other criteria that may be composed of a mix of other activities, observation results and/or other groups. To evaluate whether the contingency was satisfied, the simple existence of a PerformedActivity (or subclass) related to the DefinedActivity (or subclass) is not enough by itself. The PerformedActivity.statusCode and PerformedActivity.negationIndicator must also be checked to ensure that the activity was actually performed. PerformedActivity.statusCode must be \'Completed\' and PerformedActivity.negationIndicator must not be \'true\'.
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