An ontology to describe associations between things. Although this ontology was designed with music similarity in mind, it can readily be applied to other domains. @en
The OCDS is a data model that aims at structuring and publishing contracting data (tenders, procurements, awards, transactions, etc.). It got international adoption and is one of the leading models in this domain. @en
Ontology Specialties describes all possible specialties (directions) in the RF, in which the UGNS they are composed, as well as information about their old codes / groups / names. @en