<?xml version="1.0" encoding="UTF-8"?> <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:ns0="https://w3id.org/seas/" xmlns:voaf="http://purl.org/vocommons/voaf#" xmlns:owl="http://www.w3.org/2002/07/owl#" xmlns:dct="http://purl.org/dc/terms/" xmlns:vann="http://purl.org/vocab/vann/" xmlns:cc="http://creativecommons.org/ns#" xmlns:ns1="https://www.apache.org/licenses/"> <voaf:Vocabulary rdf:about="https://w3id.org/seas/FeatureOfInterestOntology"> <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/> <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Ontology"/> <dct:creator rdf:resource="http://www.maxime-lefrancois.info/me#"/> <vann:preferredNamespacePrefix>seas</vann:preferredNamespacePrefix> <vann:preferredNamespaceUri rdf:resource="https://w3id.org/seas/"/> <owl:versionIRI rdf:resource="https://w3id.org/seas/FeatureOfInterestOntology-1.0"/> <dct:modified rdf:datatype="http://www.w3.org/2001/XMLSchema#date">2016-09-21</dct:modified> <owl:versionInfo>v1.0</owl:versionInfo> <cc:license rdf:resource="https://www.apache.org/licenses/LICENSE-2.0"/> <dct:description xml:lang="en">This ontology defines feature of interest and their properties, as an extension of the core classes of the SSN ontology (https://www.w3.org/ns/ssn/). A feature of interest is an abstraction of a real world phenomena (thing, person, event, etc). A feature of interest is then defined in terms of its properties, which are qualifiable, quantifiable, observable or operable qualities of the feature of interest. Figure below provides an overview of the concepts in this ontology: [](https://w3id.org/seas/featureofinterest.png) For example the following RDF Graph describes a fridge, with its property `&lt;fridge/1/consumption&gt;`: ``` &lt;fridge/1&gt; a seas:FeatureOfInterest ; seas:hasProperty &lt;fridge/1/consumption&gt; . ``` One can further define the semantics of this property by refining the relationship it has with `&lt;fridge/1&gt;`. This is done using sub properties of `seas:hasProperty`, informally named *property keys*, that are functional properties with domain `seas:FeatureOfInterest` and range `seas:Property`. For example, ``` ex:consumption a owl:ObjectProperty , owl:FunctionalProperty ; rdfs:subPropertyOf seas:hasProperty ; rdfs:domain ex:ElectricPowerSystem ; rdfs:range ex:EnergyProperty . ``` Then the link between `&lt;fridge/1&gt;` and property `&lt;fridge/1/consumption&gt;` can be further specified: ``` &lt;fridge/1&gt; a seas:FeatureOfInterest ; ex:consumption &lt;fridge/1/consumption&gt; . ``` If a property is quantifiable, then it has one unique quantity dimension. There is hence a vocabulary of property classes depending on the quantity dimension they have. Unlike in the 2005 SSN ontology, any feature of interest property may itself be a feature of interest. In fact, the SSN ontology was originally based on the DUL ontology, which imposed that properties could not be feature of interest themselves. Yet we identified in some use cases where properties should have properties. For example, the fridge consumption has a frequency, or a faults counter. ``` &lt;fridge/1/consumption&gt; a seas:FeatureOfInterest ; ex:frequency &lt;fridge/1/consumption/frequency&gt; . ``` One may also define the class of electric power systems as the class of feature of interest that are linked to some property by property key `ex:consumption`: ``` ex:ElectricPowerSystem a owl:Class ; rdfs:subClassOf [ owl:onProperty ex:consumption ; owl:someValuesFrom seas:Property ] . ``` Alignments to other ontologies are proposed in external documents: - [SSNAlignment](https://w3id.org/seas/SSNAlignment) proposes an alignement to the [SSN ontology](http://www.w3.org/ns/ssn/). - [QUDTAlignment](https://w3id.org/seas/QUDTAlignment) proposes an alignement to the [QUDT ontology](http://qudt.org/). Sub types of `seas:Property` constrain the type of the value of the property. This ontology defines only two such sub types of property, `seas:BooleanProperty` and `seas:EnumeratedProperty`. Other ontologies may define many more. There may be many other sub properties of `seas:hasProperty` define the semantics of the link between a feature of interest and its property. This ontology defines only one such subproperty of hasProperty: `seas:location`. Other ontologies may define many more. </dct:description> <dct:issued rdf:datatype="http://www.w3.org/2001/XMLSchema#date">2016-07-01</dct:issued> <dct:title xml:lang="en">The SEAS Feature of Interest ontology.</dct:title> </voaf:Vocabulary> <rdf:Description rdf:about="https://w3id.org/seas/FeatureOfInterest"> <rdfs:isDefinedBy rdf:resource="https://w3id.org/seas/FeatureOfInterestOntology"/> </rdf:Description> <rdf:Description rdf:about="https://w3id.org/seas/PercentageProperty"> <rdfs:isDefinedBy rdf:resource="https://w3id.org/seas/FeatureOfInterestOntology"/> </rdf:Description> <rdf:Description rdf:about="https://w3id.org/seas/Property"> <rdfs:isDefinedBy rdf:resource="https://w3id.org/seas/FeatureOfInterestOntology"/> </rdf:Description> <rdf:Description rdf:about="https://w3id.org/seas/derivesFrom"> <rdfs:isDefinedBy rdf:resource="https://w3id.org/seas/FeatureOfInterestOntology"/> </rdf:Description> <rdf:Description rdf:about="https://w3id.org/seas/hasProperty"> <rdfs:isDefinedBy rdf:resource="https://w3id.org/seas/FeatureOfInterestOntology"/> </rdf:Description> <rdf:Description rdf:about="https://w3id.org/seas/isPropertyOf"> <rdfs:isDefinedBy rdf:resource="https://w3id.org/seas/FeatureOfInterestOntology"/> </rdf:Description> </rdf:RDF>