DCMI Metadata Terms

"This document is an up-to-date, authoritative specification of all metadata terms maintained by the Dublin Core Metadata Initiative. Included are the fifteen terms of the Dublin Core Metadata Element Set, which have also been published as IETF RFC 5013 [RFC5013], ANSI/NISO Standard Z39.85-2007 [NISOZ3985], and ISO Standard 15836:2009 [ISO15836]."

Event Ontology

"This ontology is centered around the notion of event, seen here as the way by which cognitive agents classify arbitrary time/space regions (...). This ontology has already been proven useful in a wide range of context, due to its simplicity and usability: from talks in a conference, to description of a concert, or chords being played in a Jazz piece (when used with the Timeline ontology), festivals, etc."

Friend of a Friend vocabulary

"FOAF is a project devoted to linking people and information using the Web. Regardless of whether information is in people's heads, in physical or digital documents, or in the form of factual data, it can be linked. FOAF integrates three kinds of network: social networks of human collaboration, friendship and association; representational networks that describe a simplified view of a cartoon universe in factual terms, and information networks that use Web-based linking to share independently published descriptions of this inter-connected world.

Music Ontology

"The Music Ontology Specification provides main concepts and properties fo describing music (i.e. artists, albums and tracks) on the Semantic Web. This vocabulary defines 54 classes and 153 properties. Music Ontology data can be published by anyone as part of a web site or an API and linked with existing data, therefore creating a music-related web of data."

Multilingual Classification of European Skills, Competences, Qualifications and Occupations

"ESCO identifies and categorises skills/competences, qualifications and occupations relevant for the EU labour market and education and training, in 22 European languages. It provides occupational profiles showing which competences and qualifications are relevant for an occupation. ESCO is developed in an open IT format that can be used by third parties' software. It can be accessed through the ESCO portal and is available free of charge to everyone."

Solar System SKOS Ontology Model

"This is an ontological knowledge organization system of the planets, dwarf planets, natural satellites, and small solar system bodies in the Solar System using the SKOS, Simple Knowledge Organization System, schema extended. The model defines resources in English, Spanish, Russian, and simplified Chinese. Each resource entry also contains definitions. This facilitates the generation of mono- or multi-lingual glossaries. The concept terms can be used to feed vocabularies to search applications.

World Bank Group Topical Taxonomy

"The WBG Taxonomy is a classification schema which represents the concepts used to describe the World Bank Group’s topical knowledge domains and areas of expertise - expertise – the ‘what we do’ and ‘what we know’ aspect of the Bank’s work. The WBG Taxonomy provides an enterprise-wide, application-independent framework for describing all of the Bank’s areas of expertise and knowledge domains, current as well as historical, representing the language used by domain experts and domain novices, and Bank staff and Bank clients."