This part of ISO 25964 gives recommendations for the development and maintenance of thesauri intended forinformation retrieval applications. It applies to vocabularies used for retrieving information about all types ofinformation resources, irrespective of the media used (text, sound, still or moving image, physical object ormultimedia) including knowledge bases and portals, bibliographic databases, text, museum or multimediacollections, and the items within them.The document also provides a data model and recommended format for import and export of thesaurus data.This part of this International Standard applies to monolingual and multilingual thesauri.This