@prefix dcterms: <http://purl.org/dc/terms/>.
@prefix foaf: <http://xmlns.com/foaf/0.1/>.
@prefix wdrs: <http://www.w3.org/2007/05/powder-s#>.
@prefix owl: <http://www.w3.org/2002/07/owl#>.
@prefix xsd: <http://www.w3.org/2001/XMLSchema#>.
@prefix gr: <http://purl.org/goodrelations/v1#>.
@prefix xml: <http://www.w3.org/XML/1998/namespace>.
@prefix vcard: <http://www.w3.org/2006/vcard/ns#>.
@prefix dc: <http://purl.org/dc/elements/1.1/>.
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>.
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>.
@prefix pto: <http://www.productontology.org/id/>.
@prefix schema: <http://schema.org/>.


# OWL DL work-arounds (instead of imports)
dc:contributor a owl:AnnotationProperty.
dc:creator a owl:AnnotationProperty.
dc:rights a owl:AnnotationProperty.
dc:subject a owl:AnnotationProperty.
dc:title a owl:AnnotationProperty.
dcterms:license a owl:AnnotationProperty.
wdrs:describedby a owl:AnnotationProperty.
foaf:Document a owl:Class.
foaf:homepage a owl:AnnotationProperty.
foaf:page a owl:AnnotationProperty.
foaf:primaryTopic a owl:AnnotationProperty.
schema:Product a owl:Class.


#OWL 1 DL compatibility of the OWL2 deprecated property
owl:deprecated a owl:AnnotationProperty.

<http://www.productontology.org/#> 	a owl:Ontology;
	dc:title "PTO: The Product Types Ontology for Semantic Web-based E-Commerce"@en;
	rdfs:comment """The Product Types Ontology: Good identifiers for product types based on Wikipedia

This service provides GoodRelations-compatible class definitions for any type of product or service that has an entry in the English Wikipedia.

Vocabulary:    http://www.productontology.org/#
Namespace:     http://www.productontology.org/

The Product Types Ontology is designed to be used in combination with GoodRelations, a standard vocabulary for the commercial aspects of offers.

See http://purl.org/goodrelations/ for more information."""@en;
	rdfs:label "The Product Types Ontology for Semantic Web-based E-Commerce"@en;
	dc:contributor "The class abstracts and translations of labels are taken from Wikipedia, the free encyclopedia."@en;
	dc:creator "Martin Hepp"@en;
	dc:rights "The class definition texts are taken from Wikipedia, the free encyclopedia under a Creative Commons Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0) license, see http://creativecommons.org/licenses/by-sa/3.0/. Accordingly, all ontology class definitions provided in here are available under the very same license."@en;
	dc:subject "E-Commerce, E-Business, GoodRelations, Ontology, Wikipedia, DBPedia"@en;
	dcterms:license <http://creativecommons.org/licenses/by-sa/3.0/>;
	rdfs:seeAlso <http://purl.org/goodrelations/v1>;
	owl:imports <http://purl.org/goodrelations/v1>;
	owl:versionInfo "2026-08-28T18:25:07.670655".

<http://www.productontology.org/> a foaf:Document;
	foaf:primaryTopic <http://www.productontology.org/#>.

<http://www.productontology.org/doc/Rocker_cover.rdf> a foaf:Document;
	foaf:primaryTopic <http://www.productontology.org/id/Rocker_cover>.
<http://www.productontology.org/doc/Rocker_cover.ttl> a foaf:Document;
	foaf:primaryTopic <http://www.productontology.org/id/Rocker_cover>.
<http://www.productontology.org/doc/Rocker_cover> a foaf:Document;
	foaf:primaryTopic <http://www.productontology.org/id/Rocker_cover>.
	
<http://www.productontology.org/id/Rocker_cover> a owl:Class;
	rdfs:subClassOf gr:ProductOrService, schema:Product;
	rdfs:label "Rocker cover"@en;
	rdfs:comment """A rocker cover, or valve cover (US/Canada) is a cover that encloses the rocker arm in an internal combustion engine, bolting with a gasket seal to the engine head. Engines with more than one head (such as a V8) will have multiple rocker covers. On engines without rocker arms, such as some overhead cam and most dual overhead cam types, they are known as rocker boxes in the United Kingdom.
On modern engines without rocker arms they are internationally known as &quot;valve cover&quot; but are sometimes referred to as a &quot;cam cover&quot; or &quot;timing cover&quot; if they also cover the timing gear(s) and belt or chain.
Very large multi-cylinder engines, such as those used in a ship or in aviation, may have one rocker cover for each cylinder, to make removal and installation more manageable. 

(Source: Wikipedia, the free encyclopedia, see http://en.wikipedia.org/wiki/Rocker_cover)"""@en;
	rdfs:isDefinedBy <http://www.productontology.org/#>;
	rdfs:label "Ventildeckel"@de; 
	rdfs:label "Tapa de balancines"@es; 
	rdfs:label "ヘッドカバー"@ja; 
	rdfs:label "Клапанная крышка"@ru; 

	rdfs:seeAlso <http://www.productontology.org/>,
		<http://dbpedia.org/resource/Rocker_cover>,
		<http://www.productontology.org/doc/Rocker_cover>;

	wdrs:describedby <http://www.productontology.org/doc/Rocker_cover.rdf>, <http://www.productontology.org/doc/Rocker_cover.ttl>;
	foaf:homepage <http://www.productontology.org/doc/Rocker_cover.html>;
	foaf:page <http://en.wikipedia.org/wiki/Rocker_cover>.