loci.cat

Models

Background Models

There are a series of well-known OWL models that are used for concepts relevant to LongSpine. These include both the technical, structural, models of how to represent data elements generally and also the conceptual models of particular domains’ concepts. The following models are used by Loc-I:

Table M1: Background models used in LongSpine

Ontology Description Role in Loc-I
Resource Description Framework (RDF) The fundamental data model used for Semantic Web and Linked Data applications. It models objects and relations. Required for any RDF-based system
RDF Schema (RDFS) A schema on top of RDF for modelling types of things and specailisations Required for most RDF-based systems
Web Ontology Language (OWL) An extension to RDFS that uses set theory to describe detailed relationships between things Allows for nuanced classes of object, like different Organisations
Dublin Core Terms A vocabulary of basic annotation properties for things like title, description, source, created date etc. Allows for basic annotations on many LongSpine objects
schema.org A large, general-purpose, OWL model of common classes of objects and relations Used for basic object types like Person and properties like birthDate
Time Ontology in OWL (TIME) An OWL ontology of temporal concepts, for describing the temporal properties of resources Used for all LongSpine real-world temporality
The Dataset Catalogue Vocabulary (DCAT) An OWL ontology designed to facilitate interoperability between data catalogs published on the Web Used to describe LongSpine Datasets at the whole-of-dataset level
Vocabulary of Interlinked Datasets (VoID) An OWL ontology for expressing metadata about RDF datasets, particularly relations between them Used primarily for its definition of a Linkset
The Organization Ontology (ORG) An OWL core ontology for organizational structures Used as the basis for LongSpine organisations modelling
Simple Knowledge Organization System (SKOS) An OWL model for expressing the basic structure and content of concept schemes such as thesauri, classification schemes, subject heading lists, taxonomies, folksonomies Used to structure the vocabularies and thesauri of government functions

All of these models are loaded into the Loc-I reference cache, i.e. individual Datasets and Linksets, as a series of Named Graphs which means, they can be selected for use, or excluded, within individual queries against the Loc-I reference cache.