Introduction
For reference, the ddl prefix is bound to the URI: http://code.google.com/p/fuxi/wiki/DataDescriptionLanguage#
Details
The following classes and classes can be used to assign one or more URIs as derived or base predicates
ddl:DerivedClassList and ddl:DerivedPropertyList
The class of RDF lists whose members are each URIs of derived predicates
ddl:BaseClassList
Same structure as ddl:DerivedClassList except the members are URIs of base predicates
ddl:DerivedPropertyPrefix
The class of RDF lists whose members are each URIs that are a common prefix for the URIs of derived, binary predicates and is a good way to specify an entire terminology (which shares a common namespace URI) as derived
ddl:DerivedClassPrefix
Same as ddl:DerivedPropertyPrefix except the prefix identifies URIs of derived unary predicates
ddl:BaseClassPrefix
Similar to ddl:DerivedClassPrefix except the prefix identifies URIs of base unary predicates
ddl:BasePropertyPrefix
Similar to ddl:DerivedPropertyPrefix except it provides a common prefix for base binary predicates
ddl:DerivedClassQuery
The class of RDF strings that are SPARQL queries which when evaluated against a given OWL graph returns the URIs of derived, unary predicates