Definitions

Broader term: Preferred term representing a concept broader in scope and to which one or more narrower terms are subordinate in a hierarchy. A broader term is normally in a "genus/species" or "whole/part" relationship to the preferred term of the record.

Narrower term:
Preferred term representing a concept narrower in scope and that is subordinate to one or more broader terms in a hierarchy. A narrower term is normally in a "genus/species" or "whole/part" relationship to the preferred term of the record.

Non-preferred term:
Synonym, quasi-synonym or spelling variant of a preferred term. A non-preferred term, also called synonym, non-descriptor, entry term or lead-in term, should not be used for indexing. Its role is to point users to the preferred term (the one that should be used in indexing). In the alphabetical list of results, non-preferred terms of the Government of Canada Core Subject Thesaurus appear in boldface and italics. In term records, the relationship between preferred terms and non-preferred terms is shown by the reciprocal references "Use" and "Used for".

Preferred term:
Term used in indexing to represent a given concept. Also called descriptor. In the alphabetical list of results, preferred terms of the Government of Canada Core Subject Thesaurus appear in boldface. In term records, the relationship between preferred terms and non-preferred terms is shown by the reciprocal references "Use" and "Used for".

Related term:
Preferred term that is mentally associated with another preferred term, but that is not part of the same hierarchy.

Scope note:
Note specifying the meaning of a preferred term or defining its usage limitations for the purpose of indexing.