Ontology

The Component Metadata Infrastructure provides a framework to create and use self-defined metadata formats. It relies on a modular model of so-called metadata components, which can be assembled together, to improve reuse, interoperability and cooperation among metadata modelers. The model is standardised in ISO 24622-1 and ISO 24622-2. The serialization is typically in XML. Metadata in this format are often distributed via OAI-PMH. The definition of data categories is provided externally, for example by linking to schema.org or the Clarin Concept Registry.

MOD (Metadata for Ontology Description and Publication Ontology) is a metadata schema designed to describe semantic artefacts, such as ontologies, vocabularies, and terminologies, in a standardized and FAIR-compliant way. Developed in the RDA Vocabulary Service Interest Group (VSIG) then within the FAIR-IMPACT EOSC project, MOD is based on DCAT2 and builds on existing metadata standards like DC, Schema.org, ADMS, etc. to provide a structured framework for capturing essential information about these artefacts, including their provenance, licensing, versioning, and usage. The schema facilitates interoperability between ontology repositories and enables better discovery, reuse, and integration of semantic resources in various domains. It is the baseline for MOD-API a Web service API specification for operations on semantic artefact catalogues. MOD is openly available on GitHub, where it is maintained and extended based on community input.