@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 "2026-04-03T22:53:29.417430".

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

<http://www.productontology.org/doc/Milk_frother.rdf> a foaf:Document;
	foaf:primaryTopic <http://www.productontology.org/id/Milk_frother>.
<http://www.productontology.org/doc/Milk_frother.ttl> a foaf:Document;
	foaf:primaryTopic <http://www.productontology.org/id/Milk_frother>.
<http://www.productontology.org/doc/Milk_frother> a foaf:Document;
	foaf:primaryTopic <http://www.productontology.org/id/Milk_frother>.
	
<http://www.productontology.org/id/Milk_frother> a owl:Class;
	rdfs:subClassOf gr:ProductOrService, schema:Product;
	rdfs:label "Milk frother"@en;
	rdfs:comment """A milk frother is a utensil for making milk froth, typically to be added to coffee (cappuccino, latte, etc.). It aerates the milk, creating a thick but light foam. Milk frothers were introduced through the use of espresso machines that contained steamed wands that would froth steamed milk. Although created in Italy, the espresso machine and steam wands were exported internationally to other countries, and frothed milk was introduced around the world.
The tiny bubbles, which are formed during the aeration process of milk frothing, make the milk texture lighter and increase its volume. The air from milk frothers combined with the chemical properties in milk create the foamy texture of frothed milk. Milks with different protein and fat contents produce different types of foam. There are various types of milk foams based on the type of milk used in the process, and all yield different tastes and textures. There are three major types of milk frother: manual, handheld electric, and automatic. All devices create milk froth by introducing air bubbles into the milk. 

(Source: Wikipedia, the free encyclopedia, see http://en.wikipedia.org/wiki/Milk_frother)"""@en;
	rdfs:isDefinedBy <http://www.productontology.org/#>;
	rdfs:label "مرغاة حليب"@ar; 
	rdfs:label "Milchaufschäumer"@de; 
	rdfs:label "Pembuih susu"@id; 
	rdfs:label "Montalatte"@it; 
	rdfs:label "Melkklopper"@nl; 
	rdfs:label "奶泡器"@zh; 

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

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