Vocabulary Definition Exchange (VDEX)

IMS VDEX "allows the exchange and expression of simple machine-readable lists of human language terms, along with information that may assist a human in understanding the meaning of the various terms. Put more simply, it is a mark-up language – or grammar – for controlled vocabularies, with VDEX allowing the description and creation of controlled vocabularies that could be easily interchanged" (en.wikipedia, s.v. "IMS VDEX").

ATVocabularyManager claims to be able to use vocabularies defined in VDEX XML files

• IMS Vocabulary Definition Exchange (VDEX) specification
• ICBL VDEX Implementation Project
• CETIS: Open Source IMS VDEX authoring tool available
• Wikipedia Definition: IMS VDEX