As of May 21, 2004, the National Library of Canada (NLC) and the National Archives of Canada (NAC) became Library and Archives Canada (LAC).
The following list outlines the changes to the CAN/MARC authority format resulting from the harmonization of CAN/MARC and USMARC. The changes include: new fields, obsolete fields, name changes, new content designators and obsolete content designators. Name changes, new fields and new content designators are indicated by italics. Obsolete fields and content designators are flagged with the word OBSOLETE.
Please note that the changes outlined constitute a pre-implementation notice. This list is being issued for information purposes only. The National Library of Canada has developed a phased-in implementation of the harmonization changes, beginning in January 1999. For details of the implementation schedule, see "Implementation of CAN/MARC - USMARC Harmonization Changes."