OCLC limits effective use and searching of the 583 field. 583 fields in OCLC records display only to the recording institution and its contents are not indexed. Prospective cataloging is the practice of cataloging the microform or digital product as though reproduction were complete at the moment of selection for reproduction. Prospective cataloging leaves some elements of the 533, Reproduction Note, field blank until the product has been created. Terms for use in the 583 field are currently under revision by the American Library Associations' Preservation and Reproduction Section Intellectual Access Committee.
Revision is almost complete.
Instruction for use of the 583 field will be given at that time.