Editing Web Ontology Language (section)

===Examples===
* The W3C OWL 2 Web Ontology Language provides syntax examples.<ref name="owl2.primer">{{cite web |url=http://www.w3.org/TR/2009/REC-owl2-primer-20091027/ |title=OWL 2 Web Ontology Language Primer |last1=Hitzler |first1=Pascal |author-link1=Pascal Hitzler |last2=Krötzsch |first2=Markus |author-link2=Markus Krötzsch |last3=Parsia |first3=Bijan |last4=Patel-Schneider |first4=Peter F. |last5=Rudolph |first5=Sebastian |author-link5=Sebastian Rudolph |date=2009-10-27 |work=OWL 2 Web Ontology Language |publisher=World Wide Web Consortium |access-date=15 October 2013}}</ref>

====Tea ontology====
Consider an ontology for tea based on a Tea class. First, an ontology identifier is needed. Every OWL ontology must be identified by a [[URI]]{{Citation needed|date=December 2024}} (<nowiki>http://www.example.org/tea.owl</nowiki>, say). This example provides a sense of the syntax. To save space below, preambles and prefix definitions have been skipped.

;OWL2 Functional Syntax: <syntaxhighlight lang="turtle">
Ontology(<http://example.org/tea.owl>
  Declaration( Class( :Tea ) )
)
</syntaxhighlight>

;OWL2 XML Syntax: <syntaxhighlight lang="xml">
 <Ontology ontologyIRI="http://example.org/tea.owl" ...>
   <Prefix name="owl" IRI="http://www.w3.org/2002/07/owl#"/>
   <Declaration>
     <Class IRI="Tea"/>
   </Declaration>
 </Ontology>
</syntaxhighlight>

;Manchester Syntax: <syntaxhighlight lang="turtle">
Ontology: <http://example.org/tea.owl>
Class: Tea
</syntaxhighlight>

;RDF/XML syntax:<syntaxhighlight lang="xml">
<rdf:RDF ...>
    <owl:Ontology rdf:about="http://www.example.org/tea.owl"/>
    <owl:Class rdf:about="#Tea"/>
</rdf:RDF>
</syntaxhighlight>

;RDF/[[Turtle (syntax)|Turtle]]: <syntaxhighlight lang="turtle">
 <http://example.org/tea.owl> rdf:type owl:Ontology .
 :Tea  rdf:type            owl:Class .
</syntaxhighlight>