Thesaurus and Heading Lists: Equivalences and Divegences

Abstract

The variety of indexing systems needs interoperability to satisfy global information. In mapping projects and related literature, the focus is predominantly on equivalence relationships between terms. Starting from ex- amples of terms mapped between the Thesaurus of Nuovo Soggettario and LCSH and Rameau, the semantic relationships of terms are explored to verify correspondences and divergences in related terms. The different structure of the examined vocabularies leads to semantic networks that are not parallel. Specific and general remarks follow, in light of ISO 25964:2011-2013 and recent revisions.