dc - Dublin Core: The record was converted from a simple resource description record into another syntax (e.g., HTML or SGML) using the Dublin Core metadata element set. The content of the record (descriptive elements and headings) may or may not follow any cataloging standards (e.g., AACR2, ISBD).

dhca - Dance Heritage Coalition Access Project: The record was authenticated under the auspices of the Dance Heritage Coalition Access Project.

gamma - Georgia Archives & Manuscripts Automated Access Project: The record was authenticated under the auspices of the Georgia Archives & Manuscripts Automated Access Project, coordinated by the University Center in Georgia.

gils - Government Information Location Service: The record has been derived from a locator record contained in a GILS server using the GILS Application Profile. The content of the record (descriptive elements and headings) may or may not follow any cataloging standards (e.g., AACR2, ISBD).

isds/c - ISSN Canada: The CONSER ISSN Network data elements have been verified by ISSN Canada. ISSN Canada authenticates ISSN data elements for Canadian imprints. The code reflects the ISSN Network's earlier name, ISDS (International Serials Data System).

lc - Library of Congress: The CONSER descriptive elements and all headings have been verified by the Library of Congress. LC authenticates records not within the purview of the National Library of Canada.

lcac - LC Annotated Children's Cataloging Program: The cataloging record was handled as part of the Library of Congress Annotated Children's Cataloging Program whereby summaries and children's subject headings are added to facilitate the use of the item by a juvenile audience.

lccopycat - LC Copy Cataloging: The Library of Congress has used another organization's record as the basis for its cataloging. All headings have been checked against the relevant authority file (except subject headings not from Library of Congress Subject Headings).

lccopycat-nm - LC Copy Cataloging-Near Match: The Library of Congress has used an existing bibliographic record that is not an exact match of the item in hand as the basis for its cataloging. The record copied could be from LC or another cataloging agency. The record copied could be for another edition, version, or format of the item. The data are updated to fully reflect the item in hand. All headings have been checked against the relevant authority file (except subject headings not from Library of Congress Subject Headings).

lcd - CONSER full authority application: The CONSER descriptive elements and all headings have been verified by the Library of Congress or an authenticating CONSER participant.

lcderive - LC derived cataloging: The Library of Congress has used another organization's catalog record essentially "as is" for its cataloging. All headings and uniform titles have been processed through special software developed to evaluate and ensure that the headings and uniform titles match all existing LC authority records and conform to cataloging rules.

lchlas - LC Handbook of Latin American Studies: The descriptive and subject elements have been derived from the internal Library of Congress Handbook of Latin American Studies file. Name headings may or may not have been verified against LC's name authority file.

lcllh - LC Law Library Hispanic: The descriptive elements have been derived from the internal Library of Congress Index to Hispanic Legislation. Name headings have been verified against LC's name authority file.

lcnccp - LC National Coordinated Cataloging Program: The record is a Library of Congress National Coordinated Cataloging Program record. The headings are all present in LC's authority files and the descriptive elements follow AACR 2.

lcnitrate - LC Nitrate Film: The descriptive elements have been derived from a Library of Congress database containing inventory information on LC's nitrate film collection. Name headings have not been verified against LC's name authority file.

lcnuc - National Union Catalog: Descriptive elements have been edited and all headings verified against the relevant authority file for inclusion in an LC NUC file.

lcode - LC Overseas Data Entry: The record is from one of LC's overseas field offices. The descriptive elements follow AACR 2 and the headings have been checked off-line against LC's name authority file using MARC-Names (on CD-ROM).

msc - CONSER minimal authority application: The CONSER descriptive elements have been verified by the Library of Congress or an authenticating CONSER participant. All headings have been checked against the relevant authority file, but an authority record was not found for one or more headings.

nlc - National Library of Canada: The CONSER descriptive elements and headings have been verified by the National Library of Canada. NLC authenticates records for Canadian imprints and records of Canadian interest.

nlmcopyc - National Library of Medicine Copy Cataloging: The National Library of Medicine has used another organization's record as the basis for its cataloging. All headings have been checked against the relevant authority file (except subject headings not from the National Library of Medicine).

nsdp - National Serials Data Program: The ISSN Network data elements have been verified by the United States National Serials Data Program. NSDP authenticates ISSN Network data elements for U.S. imprints. NSDP also authenticates ISSN assignments and key titles for records received from other ISSN Network centers, with the exception of Canadian imprints authenticated by ISSN Canada.

ntccf - LC National Translations Center Citation File: The descriptive elements have been derived from data in the Library of Congress National Translations Center Citation File. Name headings have not been verified against LC's name authority file.

pcc - Program for Cooperative Cataloging: The record was authenticated under the auspices of the Program for Cooperative Cataloging. All name and series headings have been checked against the appropriate national level authority file and authority records have been created if they did not already exist. Subject headings are checked for authorized forms or combinations supported by the relevant authority.

premarc - LC PreMARC Retrospective Conversion Project: The record was converted to machine-readable form as part of a Library of Congress retrospective conversion project. The source records used in the initial phase of this project (1978-1979) were printed catalog cards taken from the LC general shelflist, atlas and map shelflists, and the music shelflist. Subsequently, printed catalog cards from various other manual LC files were used as the source for additional records converted.

sanb - South African National Bibliography Project: The descriptive elements and all headings in the records have been authenticated for inclusion in the South African National Bibliography Project.

xisds/c - ISSN Canada does not consider item a serial.

xlc - LC does not consider item a serial.

xnlc - NLC does not consider item a serial.

xnsdp - NSDP does not consider item a serial.