@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 "2026-04-09T09:57:11.397986".

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

<http://www.productontology.org/doc/Metasearch_engine.rdf> a foaf:Document;
	foaf:primaryTopic <http://www.productontology.org/id/Metasearch_engine>.
<http://www.productontology.org/doc/Metasearch_engine.ttl> a foaf:Document;
	foaf:primaryTopic <http://www.productontology.org/id/Metasearch_engine>.
<http://www.productontology.org/doc/Metasearch_engine> a foaf:Document;
	foaf:primaryTopic <http://www.productontology.org/id/Metasearch_engine>.
	
<http://www.productontology.org/id/Metasearch_engine> a owl:Class;
	rdfs:subClassOf gr:ProductOrService, schema:Product;
	rdfs:label "Metasearch engine"@en;
	rdfs:comment """A metasearch engine (or search aggregator) is an online information retrieval tool that uses the data of a  web search engine to produce its own results. Metasearch engines take input from a user and immediately query search engines for results. Sufficient data is gathered, ranked, and presented to the users.
Problems such as spamming reduce the accuracy and precision of results. The process of fusion aims to improve the engineering of a metasearch engine.
Examples of metasearch engines include Skyscanner and Kayak.com, which aggregate search results of online travel agencies and provider websites.  SearXNG is a generic free and open-source search software  which aggregates results from internet search engines and other sources like Wikipedia and is offered for free by more than 70 SearXNG providers. 

(Source: Wikipedia, the free encyclopedia, see http://en.wikipedia.org/wiki/Metasearch_engine)"""@en;
	rdfs:isDefinedBy <http://www.productontology.org/#>;
	rdfs:label "محرك بحث وصفي"@ar; 
	rdfs:label "मेटासर्च इंजन"@bh; 
	rdfs:label "Metacercador"@ca; 
	rdfs:label "Metavyhledávací systém"@cs; 
	rdfs:label "Peiriant metachwilio"@cy; 
	rdfs:label "Metasuchmaschine"@de; 
	rdfs:label "Μηχανή Μετα-αναζήτησης"@el; 
	rdfs:label "Metabuscador"@es; 
	rdfs:label "Métamoteur"@fr; 
	rdfs:label "רב-מנוע"@he; 

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

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