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  • mtlo - MarineTLO Ontology
    http://www.ics.forth.gr/isl/MarineTLO/v4/marinetlo.owl
    MarineTLO is a top-level ontology for the marine domain (also applicable to the terrestrial domain). @en
  • munc - Meta-Uncertainty
    http://ns.inria.fr/munc/
    An OWL vocabulary for describing uncertainty metadata. @en
  • mus - DOREMUS is an extension of the FRBRoo model for describing the music.
    http://data.doremus.org/ontology#
    DOREMUS is an extension of the FRBRoo model for describing the music. @en
  • music - Music Vocabulary
    http://www.kanzaki.com/ns/music
    A vocabulary, or music ontology, to describe classical music and performances. Classes (categories) for musical works, events, instruments and performers, as well as related properties are defined. Make sure to distinguish musical works (e.g. Opera) from performance events (Opera_Event), or works (String_Quartette) from performer (StringQuartetEnsemble in this vocab), whose natural language terms are used interchangeblly. The present version experiments more precise model to describe a musical work, its representations (performances, scores, etc) and a musical event to present a representation (a concert). Includes 30 keys as individuals. @en
  • muto - Modular Unified Tagging Ontology (MUTO)
    http://purl.org/muto/core
    The Modular and Unified Tagging Ontology (MUTO) is an ontology for tagging and folksonomies. It is based on a thorough review of earlier tagging ontologies and unifies core concepts in one consistent schema. It supports different forms of tagging, such as common, semantic, group, private, and automatic tagging, and is easily extensible. @en
  • mv - MobiVoc: Open Mobility Vocabulary
    http://schema.mobivoc.org/
    Our goal is to significantly improve the data mobility between all stakeholders by providing a standardized vocabulary using Semantic Web technologies and ontologies. For the open vocabulary covering various mobility aspects we use RDF (Resource Description Framework) - a recommended specification of the World Wide Web Consortium (W3C) and the so-called lingua franca for the integration of data and web. We invite everyone who is interested to join our MobiVoc initiative and to participate in the development of the Open Mobility Vocabulary. @en
  • mvco - Media Value Chain Ontology
    http://purl.oclc.org/NET/mvco.owl
    The Media Value Chain Ontology (MVCO) is an ontology for formalizing the representation of the Media Value Chain. It couples naturally with the MPEG-21 multimedia framework, and its standardization as Part 19 of this ISO/IEC standard is underway (at the editing time of this document). @en
  • nao - NEPOMUK Annotation Ontology
    http://www.semanticdesktop.org/ontologies/2007/08/15/nao
    The NEPOMUK Annotation Ontology is an ontology for annotation, providing vocabulary which is commonly required to annotate resources on the semantic desktop. @en
  • nas - US National Airspace System (NAS) vocabulary
    https://data.nasa.gov/ontologies/atmonto/NAS#
    Defines concepts related to the structure of the US National Airspace System (NAS) @en
  • ncal - NEPOMUK Calendar Ontology
    http://www.semanticdesktop.org/ontologies/2007/04/02/ncal
    The NEPOMUK Calendaring Ontology intends to provide vocabulary for describing calendaring data (events, tasks, journal entries) which is an important part of the body of information usually stored on a desktop. It is an adaptation of the ICALTZD ontology created by the W3C RDF Calendar Task Force of the Semantic Web Interest Group in the Semantic Web Activity. @en
  • nco - NEPOMUK Contact Ontology
    http://www.semanticdesktop.org/ontologies/2007/03/22/nco
    NEPOMUK Contact Ontology describes contact information, common in many places on the desktop. It evolved from the VCARD specification (RFC 2426) and has been inspired by the Vcard Ontology by Renato Ianella. The scope of NCO is much broader though. This document gives an overview of the classes, properties and intended use cases of the NCO ontology. @en
  • nen2660 - NEN 2660-2:2022 'Rules for information modelling of the built environment - Part 2: Practical configuration, extension and implementation of NEN 2660-1''
    https://w3id.org/nen2660/
    Ontology which is a normative part of the Dutch NEN 2660-2 standard @en
  • nen3610 - NEN 3610 - base model geo-information
    http://modellen.geostandaarden.nl/def/nen3610
    NEN 3610 - base model geo-information – terms, definitions, relationships and general rules for the exchange of information about earth related spatial objects @en
  • nfo - NEPOMUK File Ontology
    http://www.semanticdesktop.org/ontologies/2007/03/22/nfo
    Part of Nepomuk Information Element Ontology Framework @en
  • ngeo - NeoGeo Geometry Ontology
    http://geovocab.org/geometry
    A vocabulary for specifying geographical regions in RDF @en