• narrower termA term that is subordinate to another term or to multiple terms in a hierarchy. In thesauri, the relationship indicator for this type of term is NT.
  • natural languageA language used by human beings for verbal communication. Words extracted from natural language texts for indexing purposes without vocabulary control are often called keywords.
  • navigationThe process of moving through a controlled vocabulary or an information space via some pre-established links or relationships. For example, navigation in a controlled vocabulary could mean moving from a broader term to one or more narrower terms using the predefined relationships.
  • near-synonymA term whose meaning is not exactly synonymous with that of another term, yet which may nevertheless be treated as its equivalent in a controlled vocabulary. Example: salinity, saltiness
  • node labelA “dummy” term, often a phrase, that is not assigned to documents when indexing, but which is inserted into the hierarchical section of some controlled vocabularies to indicate the logical basis on which a class has been divided. Node labels may also be used to group categories of related ...
  • non-preferred term