ocds- Schema for an Open Contracting Release (OCDS)
http://purl.org/onto-ocds/ocds
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
pproc- PPROC ontology
http://contsem.unizar.es/def/sector-publico/pproc
The PPROC ontology defines the necessary concepts to describe public procurement process and the contracts of public sector (public e-procurement). The ontology has been designed with the main purpose of publishing data about public contracts. @en