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  • rdfc - RDF Connect Ontology
    https://w3id.org/rdf-connect/ontology
    An ontology for describing programming language-specific runners, processors and pipelines in RDF-based data processing frameworks. @en
  • rdfg - Graph
    http://www.w3.org/2004/03/trix/rdfg-1/
    Properties allowing statement of intensional equivalence between RDF graphs @en
  • rdfp - The RDF Presentation ontology
    https://w3id.org/rdfp/
    ## RDF Presentation and RDF Presentation Negotiation An RDF graph can be presented in several ways, using different media types. Examples of RDF media types include `application/rdf+xml`, `text/turtle`, `application/json+ld`. Today, most of the content consumed/produced/published, on the Web is not presented in RDF. In the Web of Things, HTTP servers and clients would rather exchange lightweight documents, potentially binary. Currently, most existing RDF Presentations generically apply to any RDF graph, at the cost of being heavy text-based documents. Yet, lightweight HTTP servers/clients could be better satisfied with consuming/producing/publishing lightweight documents, may its structure be application-specific. @en
  • rdfs - The RDF Schema vocabulary
    http://www.w3.org/2000/01/rdf-schema#
    RDF Schema provides a data-modelling vocabulary for RDF data. RDF Schema is an extension of the basic RDF vocabulary. @en
  • rdft - The RDF 1.1 Test Vocabulary
    http://www.w3.org/ns/rdftest
    This is a vocabulary document and is used to define classes and properties used in RDF 1.1 Test Cases and associated test manifests. The URI of the vocabulary is http://www.w3.org/ns/rdftest# (abbreviated by rdft: in this document). Turtle and an JSON-LD versions of the vocabulary are also available. The vocabulary is published by W3C. @en
  • react - The REACT Ontology
    https://w3id.org/react
    The REACT ontology aims to represent all the necessary knowledge to support the achievement of island energy independence through renewable energy generation and storage, a demand response platform, and promoting user engagement in a local energy community. The REACT ontology has been developed as part of the REACT project which has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement no. 824395. @en
  • rec - Recommendation Ontology
    http://purl.org/ontology/rec/core#
    The Recommendation Ontology specification provides basic concepts and properties for describing recommendations on/ for the Semantic Web. @en
  • rec54 - Model of the W3C Process
    http://www.w3.org/2001/02pd/rec54#
    This is (the start of) an event-based model of the W3C process; e.g. RECdd is the class of Recommendation Director's Decisions; i.e. messages to w3c-ac-members announcing a new W3C Recommendation. @en
  • reco - RECommendations Ontology
    http://purl.org/reco#
    The RECO ontology defines the vocabulary for representing preferences-as-constraints and preferences-as-ratings as RDF graphs. This lightweight vocabulary provides domain-independent means to describe user profiles in a coherent and context-aware way. RECO has been designed as an extension of both Friend-Of-A-Friend (FOAF) and Who Am I! (WAI) ontologies. @en
  • reegle - Renewable Energy and Energy Efficiency
    http://reegle.info/schema
    Vocabulary used to describe clean energy actors, projects and technologies @en
  • rel - Relationship
    http://purl.org/vocab/relationship/
    A vocabulary for describing relationships between people @en
  • remetca - ReMetCa Ontology
    http://www.purl.org/net/remetca#
    Ontology for poetry description @en
  • rev - Review Vocabulary
    http://purl.org/stuff/rev#
    Vocabulary for expressing reviews and ratings @en
  • rico - International Council on Archives Records in Contexts Ontology (ICA RiC-O)
    https://www.ica.org/standards/RiC/ontology
    RiC-O (Records in Contexts-Ontology) is an OWL ontology for describing archival record resources. As the second part of Records in Contexts standard, it is a formal representation of Records in Contexts Conceptual Model (RiC-CM). The current official version is <html:strong>v0.2</html:strong>; it is compliant with RiC-CM v0.2 full draft, that will be published in February or March 2021, and that is slightly different from <html:a href="https://www.ica.org/sites/default/files/ric-cm-0.2_preview.pdf">RiC-CM v0.2 preview, that was published in December 2019. RiC-O provides a generic vocabulary and formal rules for creating RDF datasets (or generating them from existing archival metadata) that describe in a consistent way any kind of archival record resource. It can support publishing RDF datasets as Linked Data, querying them using SPARQL, and making inferences using the logic of the ontology. @en
  • rlog - RDF Logging Ontology
    http://persistence.uni-leipzig.org/nlp2rdf/ontologies/rlog#
    This is a helper ontology for NIF 2.0 to be able to log errors and warning messages. @en