How to link to another entity record: Quick Steps
In the record to which you wish to add a link to a related record:
How to link to another entity record: Detailed Steps
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.