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The StudyStructure element describes the general structure of a clinical study with Arms, Epochs and Workflows. Each arm is described as a workflow containing references to StudyEventGroups that represent the building blocks. The overall structure of the study for all arms can be described in a Workflow that is directly referenced by StudyStructure.
StudyEventGroups can be 'nested' (by reference), so a CDISC SDTM Trial Design Arms, Epochs and Workflows can reference StudyEventGroups representing the parts of the study design that describes what happens in a particular epoch for a particular arm. In CDISC submission standards, it is named a "Study Cell". StudyEventGroups can be nested, so a CDISC submission "Element" (the basic building block in the trial design) will be represented by a "child" StudyEventGroupreferenced StudyEventGroup from the Arm Workflow.
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