• candidate termA term under consideration for admission into a controlled vocabulary because of its potential usefulness. Also known as provisional term.
  • categoryA grouping of terms that are semantically or statistically associated, but which do not constitute a strict hierarchy based on genus/species, parent/child, or part/whole relationships. See also tree structure.
  • classification schemeA method of organization according to a set of pre-established principles, usually characterized by a notation system and a hierarchical structure of relationships among the entities.
  • compound termA term consisting of more than one word or a phrase that represents a single concept. Compound terms must be constructed according to the guidelines of this Standard. See also bound term and precoordination.
  • conceptA unit of thought, formed by mentally combining some or all of the characteristics of a concrete or abstract, real or imaginary object. Concepts exist in the mind as abstract entities independent of terms used to express them.
  • concept mapA representation in two dimensions of the conceptual relationships among terms and the concepts they represent.
  • content objectAn entity that contains data/information. A content object can itself be made up of content objects. For example, a journal is a content object made up of individual journal articles, which can each be a content object. The text, figures, and photographs included in a journal article can also be ...
  • controlled vocabularyA list of terms that have been enumerated explicitly. This list is controlled by and is available from a controlled vocabulary registration authority. All terms in a controlled vocabulary must have an unambiguous, non-redundant definition. NOTE: This is a design goal that may not be true in ...
  • cross-reference1. A direction from one term to another. See associative relationship; equivalence relationship; hierarchical relationship.