rlgid Namespace of RLG Database Record identifiers 2005-02-14 RLG 2029 Stierlin Ct., Suite 100, Mountain View, CA 94043-4684, USA http://www.rlg.org Walt Crawford wcc@notes.rlg.org +1 650 691 2227 An rlgid is a unique identifier assigned to any bibliographic record either within the RLG Union Catalog or any RLG-mounted database. These identifiers are assigned automatically on records entered online and maintained on batch-loaded records so as to assure uniqueness in records loaded in batch form. rlgid identifiers are composed of digits, letters, and (optionally) a single dash. There is no explicit limit on the length of an rlgid, and an rlgid does not carry significance other than to identify a specific bibliographic record. The uri provided below describes rlgid structure within the RLG Union Catalog; equivalent structures (with different letter identifiers) are used for other RLG-mounted databases. http://www.rlg.org/rlinmarc.html#001 RLG identifiers (rlgid instances) in the RLG Union Catalog frequently appear in the 035 tag (System Control Number) of MARC21 records. In these cases, the rlgid is preceded by a code contained within parentheses and representing the originating institution, e.g. (CStRLIN). The leading code, including parentheses and any following spaces, is stripped off to create a proper rlgid. Letters within rlgid instances are not case-sensitive. The single dash that may appear within an rlg may be omitted (but not replaced by a space). CTYG87-B14807 info:rlgid/CTYG87-B14807