?:definition
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A coded value specifying a classification of activities. EXAMPLE(S): In the case where categoryCode = \'anti-cancer treatment\', the subcategoryCode may = \'radiotherapy\', and the nameCode may = \'external beam radiotherapy\'. In Procedure, categoryCode may = \'abdominal surgery\'. In AdministrativeActivity, the categoryCode may = \'Disposition\' (off study, epoch completion), \'Milestone\' (informed consent, enrollment, registry, randomization) or \'Other\' (unblinding) activities. For lab procedures, categoryCode may = \'hematology\', \'urinalysis\', or \'chemistry\'. NOTE(S): Theoretically speaking, the categoryCode should be derivable from the subcategoryCode, however if there may only be a category and not a subcategory, then both attributes must be present in the model.
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