ISO 2788 Term Relationships for Monolingual Thesauri as Used by the IMS Vocabulary Definition Exchange Specification http://www.imsglobal.org/vocabularies/iso2788_relations.xml USE use Preferred term when a choice between synonyms or quasi-synonyms exists. UF use for Non-preferred synonym or quasi-synonym for the term being described. TT top term Broadest class to which the specific term belongs. BT broader term Term that has a broader meaning than the term being described. NT narrower term Term that has a narrower meaning than the term being described. RT related term Term related to the one being described. LOMv1.0 IsBasedOn ISO 2788:1986 - Guidelines for the establishment and development of monolingual thesauri