[type of data: normalized heading—other entity identifiers]
If an identifier has already been created in the catalog for a particular genre or form, use that identifier for all subsequently acquired works that are examples of that genre or form. If the identifier for a genre or form changes over time, change each normalized ocurrence of the identifier throughout the catalog.
Use literary warrant to determine the genre/form identifier to be used for a particular genre or form. In other words, choose as the genre/form identifier the name by which the genre or form is commonly referred to in the literature
Variant genre/form heading access
Ensure that catalog users doing any type of catalog search can search under any form of name that has been used to denote a particular genre or form and be led to the form of name being used in the catalog to identify that genre or form. [type of data: normalized heading—variant identifiers]