# /research/projects/termservices/resources/info-uri.htm

originally: http://www.oclc.org/research/projects/termservices/resources/info-uri.htm

# $node.Name

## Namespace:

  The info Registry provides a mechanism for the registration of public namespaces that are used for the identification of information assets. The Terminology Services Project Terminology Services Project has registered the kos namespace, for use by OCLC Research, for knowledge organization schemes (kos) used by libraries, museums, archives, historical societies, professional associations, and other communities.

## Status:

  Registered on 07 June 2004, pending approval by the info URI registrar.

## Description:

  The kos identifier provides a mechanism for identifying knowledge organization schemes and the concepts used in those schemes.

  The kos identifier has two elements:

  - scheme
  - concept

  The scheme element identifies the knowledge organization scheme being used and the concept element identifies a concept within a given scheme.

  The syntax for the scheme and concept identifiers:

    info:kos/scheme/«code»/«expr»/«lang»
    info:kos/concept/«code»/«id»
  «code»

    The «code» in the identifier is required and used to identify a given knowledge organization scheme.

    - When appropriate use a code from the MARC code lists for term sources.
    - When appropriate use a code from the MARC code lists for classification sources.
    - Local codes are prefixed with the string 'local-' followed by an assigned code. No locally assigned codes have been defined.
  «expr»

    The «expr» in the identifier is optional and specifies the edition name, edition number, or the publication date of the knowledge organization scheme.

    - When «code» is 'gsafd', use the expression values located here.
  «lang»

    The «lang» in the identifier is optional and specifies the language of the intended audience for the knowledge organization scheme.

    - Use RFC 3066 language codes.
  «id»

    The «id» in the identifier is required and specifies the unique identifier assigned to a concept by the creator, publisher, or maintainer of the knowledge organization scheme.

    - Use the unique identifier assigned to the concept by the creator, publisher, or maintainer of the knowledge organization scheme.

## Examples:

  kos namespace | (For information only)
  --- | ---
  «code» | «expr» | «lang» | «id» | Preferred Label

  # = blank

  aat |  |  | 300014245 | papier-mâché
  gsafd | 20010920 |  | GSAFD000001 | Adventure fiction
  lcc | 2001 |  | CF#96396097# | Z674.75.I58
  lcsh |  |  | sh#92002816# | Internet
  lcsh |  | en | sh#85097674# | Papier-mâché flowers
  mesh |  |  | D004538 | Eidetic Imagery

  info:kos/scheme/gsafd/20010920
  info:kos/concept/gsafd/GSAFD000001

  info:kos/scheme/lcsh
  info:kos/concept/lcsh/sh%2092002816%20

  info:kos/scheme/lcsh//en
  info:kos/concept/lcsh/sh%2085097674%20

Please send comments or questions to: kos@oclc.org.