As part of the new Cataloging Standard, RDA, that the Library of Congress is adopting in March of 2013 a few new MARC tags are being created and utilized. Since many libraries are already cataloging on RDA, SELCO catalogers are beginning to see and import RDA records from OCLC. One of the newer MARC tags is a 264 tag being used in place of a 260. These tags generally describe publication information. SELCO catalogers are asked not to delete the 264 tag or change it to a 260. The 264 is a valid tag. And after some work with Aquabrowser the 264 tag now indexes and displays in Aquabrowser like the 260. As for the Horizon ILS that staff use, I am looking into the possibility of utilizing the 264 now, but the next update of Horizon is expected during the 1st quarter of 2013. This update is expected to address many RDA issues with Horizon.
The 264 is very similar to the 260. Like the 260, the 264 is used for Production, Publication, Distribution, Manufacture, and Copyright Notice. Unlike the 260, the 264 has a second indicator that defines which of these descriptive elements is represented in tag. For more information about the 264 tag please see http://www.loc.gov/marc/bibliographic/bd264.html
More information about RDA and training for SELCO Online Libraries will be coming soon.