Skip to topic | Skip to bottom
Home

RDFTM
RDFTM.HandlingTypeInstancer1.2 - 27 Oct 2005 - 21:24 - LarsMariustopic end

Start of topic | Skip to actions

Type-instance relationship

The type-instance relationship is inherently binary, stating that some instance belongs to the extension of some class. In RDF this is expressed by means of an (instance rdf:type class) statement. In Topic Maps the equivalent statement would (in LTM syntax) be expressed as iso:type-instance(instance : iso:instance, class : iso:type).

In other words, both RDF and Topic Maps provide special vocabulary for expressing this particular relationship, without making the relationship part of the model proper. This means that in translating between the two, in this particular case it is necessary to mediate between the two built-in vocabularies.

RDFTM

Every triple of the form

(a rdf:type b)

becomes an association of the form

iso:type-instance(a : iso:instance, b : iso:type)

TMRDF

Every association of the form

iso:type-instance(a : iso:instance, b : iso:type)

becomes a triple of the form

(a rdf:type b)

(Note that scope handling should be referenced from here.)
to top


Copyright © 1999-2017 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding Fabio's Wiki? Send feedback