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How to Add a Link to a Related Entity

In a record for an entity, if you determine that there is a need to link this entity data to data for another entity:

To link from a relationship element in one record to a related record:

Links between FRBR Entity Groups are one way (from WEMI to PFC or COEP); so the RID from PFC or COEP records will be placed in WEMI records; but WEMI RIDs will not be placed in PFC or COEP records.

Links within FRBR Entity Groups are two way (between WEMI; between PFC; between COEP); so, e.g., the RID for a Work entity record will be placed in an Expression entity record at the same time that the RID for the Expression entity record will be placed in the Work entity record.