This document specifies a standard format for vocabularies based on the W3C's Resource Description Framework (RDF) and Simple Knowledge Organization System (SKOS). By adopting a standard and simple format, the IVOA will permit different groups to create and maintain their own specialised vocabularies while letting the rest of the astronomical community access, use, and combine them. The use of current, open standards ensures that VO applications will be able to tap into resources of the growing semantic web. The document provides several examples of useful astronomical vocabularies.
@article{arxiv.1110.0520,
title = {IVOA Recommendation: Vocabularies in the Virtual Observatory Version 1.19},
author = {Sebastien Derriere and Alasdair J G Gray and Norman Gray and Frederic V Hessman and Tony Linde and Andrea Preite Martinez and Rob Seaman and Brian Thomas},
journal= {arXiv preprint arXiv:1110.0520},
year = {2019}
}