X10 Subfield $4 - Relator code:

Subfield $4 contains a MARC code that specifies the relationship between a name and a work. More than one relator code may be used if the corporate name has more than one function. The source of the MARC code is MARC Code List for Relators, Sources, Description Conventions that is maintained by the Library of Congress. The code is given after the name portion in name/title fields.

Examples:

110 1#$aUnited States.$bEnergy Research and Development Administration.$4fnd

110 2#$aJ.H. Bufford & Co.$4pop

Relator terms, which also specify the relationship of a corporate body to a work, are contained in subfield $e .