Z39.50 is a national, as well as international, standard, which defines protocol for computer-to-computer information retrieval. It was developed by the National Information Standards Organization (NISO), an American National Standards Institute (ANSI)-accredited standards development body. It is covered by the International Organization for Standardization (ISO) standard 23950.
The U.S. Government Printing Office (GPO)'s Catalog of U.S. Government Publications (CGP) uses Ex Libris' ALEPH 500 software, which allows users to connect to the CGP with any Z39.50 client. Records supplied by GPO via Z39.50 are encoded in MARC8. MARC8 is the bibliographic data interchange format used by the CGP for Z39.50 record export.
Connection settings to access GPO's CGP via Z39.50:
Access to the CGP via Z39.50 for searching, retrieval and downloading of bibliographic records is limited to depository libraries.
The password for access is found in the Federal Depository Library Directory (FDLD) at http://catalog.gpo.gov/fdlpdir/login.jsp .
To access the password:
The following bib-1 'use' attributes are supported by GPO's Z39.50 configuration.For Keyword Searches:
|Record Date and Time Stamp (005)||1012|
|LC Subject Heading||27|
|LC Classification Number||16|
For more information on this issue, please visit our Z39.50 FAQs at: http://fdlp.gov/home/tutorials/168-gpo-catalog/252-z3950faqs
For more information on this issue, please visit our Z39.50 FAQs at: http://fdlp.gov/home/tutorials/168-gpo-cataloging/252-z3950faqs
Aleph clients support diacritics, as other Intgrated Library System clients also may; however, for some Z39.50 clients, such as MarcEdit, diacritics may not be supported, and can cause a problem when searching. If you find that your Z39.50 client has difficulties with diacritics, please replace the diacritics with the Romanized equivalent. For example, if you search the Spanish title "Ahorro de energía" you should replace the diacritic "í" with the Romanized equivalent "i" in the Z39.50 search.
For more information about GPO's Z39.50 via the CGP, please visit our Z39.50 FAQs at: http://fdlp.gov/home/tutorials/168-gpo-cataloging/252-z3950faqs
The Library of Congress (LC) is the official Z30.50 Maintenance Agency. At LC's Z39.50 web site (http://www.loc.gov/z3950/), one can find more extensive documentation on various aspects of Z39.50, from protocol and attribute descriptions to a web Gateway page.
For GPO's assistance with our Z39.50 access, please use askGPO at the following link: AskGPO. We have established a subcategory "Z39.50" under the category "Federal Depository Libraries" under the subcategory heading "CATALOG OF U.S. GOVERNMENT PUBLICATIONS" for this purpose.