Month: May 2014

RVL is a declarative RDF-based language for specifying visual mappings from RDFS/OWL data to graphic means. In the following we use the language to visualise example data specified using vocabulary from the Citation Ontology:

The above graphic was created by processing the RVL mappings below. A first mapping simply says map cito:cites to directed links
(e.g. connector lines with arrowheads).

@prefix :          <http://purl.org/rvl/example/mapping/> .
@prefix cito:      <http://purl.org/spar/cito/> .
@prefix rvl:       <http://purl.org/rvl/> .
@prefix vg:        <http://purl.org/viso/graphic/> .
@prefix rdf:       <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .

:Cites2Linking
      a rvl:PropertyMapping ;
      rvl:sourceProperty cito:cites ;
      rvl:targetObjToObjRelation vg:Linking_Directed_Relation ;
     .

If you move the pointer over the edges, you can observe that also sub-properties of cito:cites have been used in some cases.

Let’s add another mapping to distinguish the different properties by color. We realize this with a sub-mapping attached to the first mapping:

:Cites2Linking
      a rvl:PropertyMapping ;
      rvl:sourceProperty cito:cites ;
      rvl:targetObjToObjRelation vg:Linking_Directed_Relation ;
      rvl:subMapping [
        rvl:subMapping-onRole vg:linking_connector;
        rvl:subMapping-onTriplePart rdf:predicate;
        rvl:subMapping-mapping :PredicateID2Color;
      ].

:PredicateID2Color
      a rvl:PropertyMapping ;
      rvl:sourceProperty rdf:ID ;
      rvl:targetAttribute vg:color_named ;
      rvl:valueMapping [
        rvl:sourceValueOrderedSet (
            cito:confirms cito:cites cito:critiques
        );
        rvl:targetValueList (
            vg:Green vg:Yellow vg:Red
        );
      ].

More examples will follow 🙂