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See also: [[pedagogical vocabularies]] for an overview of other controlled vocabularies. | See also: [[pedagogical vocabularies]] for an overview of other controlled vocabularies. | ||
According to Reitz, a '''subject heading''' is {{quotation|The most specific word or phrase that describes the subject, or one of the subjects, of a work, selected from a list of preferred terms (controlled vocabulary) and assigned as an added entry in the bibliographic record to serve as an access point in the library catalog. A subject heading may be subdivided by the addition of subheadings (example: Libraries--History--20th century) or include a parenthetical qualifier for semantic clarification, as in Mice (Computers).}} (retrieved | According to Reitz, a '''subject heading''' is {{quotation|The most specific word or phrase that describes the subject, or one of the subjects, of a work, selected from a list of preferred terms (controlled vocabulary) and assigned as an added entry in the bibliographic record to serve as an access point in the library catalog. A subject heading may be subdivided by the addition of subheadings (example: Libraries--History--20th century) or include a parenthetical qualifier for semantic clarification, as in Mice (Computers).}} (retrieved 14:03, 27 February 2009 (UTC)) | ||
The [http://authorities.loc.gov/help/auth-faq.htm library of congress] uses the term "authority record" to describe the {{quotation|tool used by librarians to establish forms of names (for persons, places, meetings, and organizations), titles, and subjects used on bibliographic records. Authority records enable librarians to provide uniform access to materials in library catalogs and to provide clear identification of authors and subject headings. For example, works about "movies," "motion pictures," "cinema," and "films" are all entered under the established subject heading "Motion pictures."}}. | The [http://authorities.loc.gov/help/auth-faq.htm library of congress] uses the term "authority record" to describe the {{quotation|tool used by librarians to establish forms of names (for persons, places, meetings, and organizations), titles, and subjects used on bibliographic records. Authority records enable librarians to provide uniform access to materials in library catalogs and to provide clear identification of authors and subject headings. For example, works about "movies," "motion pictures," "cinema," and "films" are all entered under the established subject heading "Motion pictures."}}. | ||
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== An example == | == An example == | ||
The library of congress [http://authorities.loc.gov/ authorities] returns many | The library of congress [http://authorities.loc.gov/ authorities] returns many entries for search about "educational technology" within the "Subject authority headings". However, only a subset concerns authorized headings that are formally established in a retrievable authority record. | ||
The main "educational technology" term (without subheadings) identifies the following "see from": ''Instructional technology'', ''Technology in education'' It then defines "see also", such as "Audio-visual education" and "authorized see also" such as Technology, Educational innovation, instructional systesm, teaching - aids and devices. | |||
Note: Understanding Marc would take some time. Didn't take it yet - [[User:Daniel K. Schneider|Daniel K. Schneider]] 14:03, 27 February 2009 (UTC). | |||
== Standards == | == Standards == | ||
Revision as of 15:03, 27 February 2009
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Definition
A subject heading is part of a systematic list of terms that describe a given subject matter, e.g. like in a library catalogue.
See also: pedagogical vocabularies for an overview of other controlled vocabularies.
According to Reitz, a subject heading is “The most specific word or phrase that describes the subject, or one of the subjects, of a work, selected from a list of preferred terms (controlled vocabulary) and assigned as an added entry in the bibliographic record to serve as an access point in the library catalog. A subject heading may be subdivided by the addition of subheadings (example: Libraries--History--20th century) or include a parenthetical qualifier for semantic clarification, as in Mice (Computers).” (retrieved 14:03, 27 February 2009 (UTC))
The library of congress uses the term "authority record" to describe the “tool used by librarians to establish forms of names (for persons, places, meetings, and organizations), titles, and subjects used on bibliographic records. Authority records enable librarians to provide uniform access to materials in library catalogs and to provide clear identification of authors and subject headings. For example, works about "movies," "motion pictures," "cinema," and "films" are all entered under the established subject heading "Motion pictures."”.
An example
The library of congress authorities returns many entries for search about "educational technology" within the "Subject authority headings". However, only a subset concerns authorized headings that are formally established in a retrievable authority record.
The main "educational technology" term (without subheadings) identifies the following "see from": Instructional technology, Technology in education It then defines "see also", such as "Audio-visual education" and "authorized see also" such as Technology, Educational innovation, instructional systesm, teaching - aids and devices.
Note: Understanding Marc would take some time. Didn't take it yet - Daniel K. Schneider 14:03, 27 February 2009 (UTC).
Standards
Subject headings can be quite formal, e.g. see Marc 21 Format for Authority Data's topical terms (X50)
Bibliography
Reitz, J.M. Online Dictionary for Library and Information Science, http://lu.com/odlis/odlis_g.cfm