ANSI/NISO Z39.19

ANSI/NISO Z39.19 is an international standard that guides how to develop and evaluate controlled vocabularies for information resources, such as thesauri, taxonomies, or ontologies. These vocabularies help organize and retrieve information consistently across systems by defining terms, their relationships, and hierarchical structures. The standard ensures clarity, consistency, and interoperability, making it easier for users and systems to find, access, and connect information effectively. Essentially, it provides best practices for creating structured, standardized vocabularies that improve information management and discovery.