?:definition
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A relationship between a composite activity and a component activity that comprises it, i.e. parent and child activities where all activities are intended to occur at some point in the context of a particular study or experiment. EXAMPLE(S): A battery of tests may be composed of multiple routine labs that are always ordered together as a group. A glucose tolerance test which is comprised of administering glucose and taking multiple timed blood samples which are then tested for glucose. OTHER NAME(S): NOTE(S): This class helps represent an AND relationship between siblings with the same parent activity.
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