Metadata and the Semantic Web - Web Standards: Mastering HTML5, CSS3, and XML - page 266

Syntaxes
At the high level, the OWL abstract syntax [150] and the OWL2 functional syntax [151] can be used. OWL also supports
several exchange syntaxes, including RDF syntaxes [152] (RDF/XML [153], RDF/Turtle [154]), the OWL2 XML syntax [155],
and the Manchester syntax [156]. RDF/XML is the normative syntax [157].
For example, a class declaration for a smartphone ontology can be written in various syntaxes, as shown in
Listings 7-71 to 7-75.
Listing 7-71. OWL2 Functional Syntax Example
Ontology(<http://example.com/smartphone.owl>
Declaration( Class( :Smartphone ) )
)
Listing 7-72. OWL2 XML Syntax Example
<Ontology ontologyIRI="http://example.com/smartphone.owl">
<Prefix name="owl" IRI=" http://www.w3.org/2002/07/owl# " />
<Declaration>
<Class IRI="Smartphone"/>
</Declaration>
</Ontology>
Listing 7-73. RDF/XML Syntax Example
<rdf:RDF>
<owl:Ontology rdf:about=""/>
<owl:Class rdf:about="#Smartphone"/>
</rdf:RDF>
Listing 7-74. RDF/Turtle Example
<http://example.com/smartphone.owl> rdf:type owl:Ontology.
:Smartphone rdf:type owl:Class.
Listing 7-75. Manchester Syntax Example
Ontology: <http://example.com/smartphone.owl>
Class: Smartphone
Properties
In OWL, the following types of properties exist:
• Object properties that link individuals to other individuals
• Datatype properties that link individuals to data values (subclasses of object properties)
• Annotation property ( owl:AnnotationProperty )
• Ontology property ( owl:OntologyProperty )