This section describes how the SDTM will be implemented to represent relationships between records within a domain, between records in different domains, and between datasets.
When applicable, variables IDVAR and IDVARVAL will represent variable and value pairs used as record-level keys to merge/join records between datasets. In such cases, variables represented in IDVAR may have values that are unique for:
- Each observation within a dataset.
- Groups of records in a dataset.
The uniqueness of values by observation or groups of observations.
Overview
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