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Creating an Ontology#

An ontology is created in a similar way as a d3web knowledge base using the knowledgebase markup.

%%knowledgebase

%

A more detailed description of this markup can be found on the page Doc KnowledgeFormalization.

Creating Ontology Entities within the Local Namespace#

Ontologies in KnowWE are based on the RDF standard (http://www.w3.org/TR/REC-rdf-syntax/). In RDF every resource is identified by a full qualified URI name. For brevity, KnowWE uses shortened identifier such as rdf for http://www.w3.org/1999/02/22-rdf-syntax-ns#. The resource http://www.w3.org/1999/02/22-rdf-syntax-ns#type therefore is called rdf:type in KnowWE. Ontology entities newly created within the wiki are created in the ontology repository under the so-called local namespace, that is the URL referring to the wiki installation URL. On the wiki pages, the local namespace (lns) is ommitted.

Example#

%%class Person

%%Individual Ms. MoneyPenny

%%relation "Ms. MoneyPenny" rdf:type Person
 

The following markups can be used to create ontology entities (under local namespace if the namespace prefix is omitted):

• Class
• Individual
• ObjectProperty
• Relation
• Turtle

Beside the local namespace, also other namespaces may freely be defined using the Namespace markup. For sparql queries in the SPARQL markup, always a namespace needs to be defined (including lns: for the local namespace) for triple patterns of a query.