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Relationships represented in RELREC are collected relationships. The RELREC dataset should be used to represent either:
- Explicit explicit relationships, (e.g., concomitant medications taken as a result of an adverse event) ; or
- Information information of a nature that necessitates using multiple datasets and that may need to be examined together for analysis or proper interpretation.
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| Metadataspec |
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| Num | Combination | Description |
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| 1 | ONE, ONE | Indicates there is not hierarchical a hierarchical relationship between the datasets and the records in the datasets. Only 1 record from each dataset will potentially have the same value of the IDVAR within USUBJID. | | 2 | ONE, MANY | Indicates there is a hierarchical (parent-child) relationship between the datasets. One record within USUBJID in the dataset identified by RELTYPE = "ONE" will potentially have the same value of the IDVAR with many (1 or more) records in the dataset identified by RELTYPE = "MANY". | | 3 | MANY, MANY | This combination is unusual and challenging to manage in a merge/join, and may represent a relationship that was never intended to convey a usable merge/join,. |
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