added commodities pattern in saref-core

    - Electricity

    - Gas

    - Water

saref-patterns:

  property_classes:

    - name: Energy

      comment: A saref:Property related to some measurements that are characterized by a certain value measured in an energy unit (such as Kilowatt_Hour or Watt_hour). Furter specializations of the saref:Energy class can be found in the SAREF4ENER extension, where classes such as EnergyMax, EnergyMin and EnergyExpected are defined. 

# Commodities

The SAREF ontology reference pattern `Commodities` defines the saref:Commodity class and its subclasses.

@prefix owl: <http://www.w3.org/2002/07/owl#> .

@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .

@prefix xml: <http://www.w3.org/XML/1998/namespace> .

@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

@prefix foaf: <http://xmlns.com/foaf/0.1/> .

@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .

@prefix saref: <https://saref.etsi.org/core/> .

@prefix dcterms: <http://purl.org/dc/terms/> .

@prefix vann: <http://purl.org/vocab/vann/> .

@base <https://saref.etsi.org/core/> .

saref:Commodity rdf:type owl:Class ;

    rdfs:comment "A marketable item for which there is demand, but which is supplied without qualitative differentiation across a market. SAREF refers to energy commodities such as electricity, gas, coal and oil. "@en ;

    rdfs:label "Commodity"@en .

PREFIX owl:   <http://www.w3.org/2002/07/owl#>

PREFIX rdfs:  <http://www.w3.org/2000/01/rdf-schema#>

PREFIX saref: <https://saref.etsi.org/core/>

SELECT * WHERE {

 ?commodity a owl:Class ;

   rdfs:subClassOf saref:Commodity ;

   rdfs:label ?label ;

   rdfs:comment ?comment .

}

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from saref_patterns import SAREF, check_patterns

from rdflib import Graph, Literal, RDF, RDFS, OWL

schema = {

    'description': 'The name of the commodity. Will be used as the local name of the IRI and the label',

    'title': 'label',

    'type': 'string'

}

def specialize(namespace, execution):

    g = Graph()

    g.add((namespace[execution], RDF.type, OWL.Class))

    g.add((namespace[execution], RDFS.subClassOf, SAREF.Commodity))

    g.add((namespace[execution], RDFS.label, Literal(execution, "en")))

    g.add((namespace[execution], RDFS.comment, Literal("A type of commodity", "en")))

    return g

if __name__ == "__main__":

    check_patterns(specialize, schema)