Changes

;Minimal : Minimal level bibliographic records include most applicable bibliographic data elements, with notes limited to those listed in the appendix. Subject analysis includes at least one classification number (Dewey and/or Library of Congress), but no subject headings or genre-form terms.

;Minimal : Minimal level bibliographic records include most applicable bibliographic data elements, with notes limited to those listed in the appendix. Subject analysis includes at least one classification number (Dewey and/or Library of Congress), but no subject headings or genre-form terms.

;Abbreviated : Abbreviated level bibliographic records include only the core bibliographic data elements, with other data elements added if only needed for identification and access and if easily determined. No subject headings or genre-form terms. Classification is limited to Library of Congress for shelving purposes.

;Abbreviated : Abbreviated level bibliographic records include only the core bibliographic data elements, with other data elements added if only needed for identification and access and if easily determined. No subject headings or genre-form terms. Classification is limited to Library of Congress for shelving purposes.

==Appendix A.1 - Required data elements by level of cataloguing treatment==

==Appendix A.1 - Required data elements by level of cataloguing treatment==