VisualDataWeb/WebVOWL

Inconsistent treatment of domain and range

Opened this issue · 8 comments

wouterbeek commented

WebVOWL currently treats domain classes in a different way than range classes. For the following example:

prefix : <https://example.com/>

:simple
  rdfs:domain :From;
  rdfs:range :To.

WebVOWL will display the :To class but not the :From class.

Expected: classes specified in domain and range to be treated/visualized in a similar way.

Workaround: add at least one statement about the :From class (e.g., :From a owl:Class).

gabriellopes commented

It's okay, actually...

rdfs:domain a rdf:Property ;
	rdfs:isDefinedBy <http://www.w3.org/2000/01/rdf-schema#> ;
	rdfs:label "domain" ;
	rdfs:comment "A domain of the subject property." ;
	rdfs:range rdfs:Class ;
	rdfs:domain rdf:Property.

from (http://www.w3.org/2000/01/rdf-schema#)

the rdfs:domain of rdfs:domain Property isn't defined as a rdfs:Class, but a rdf:Property. Otherwise, I guess, it wouldn't be able to state a Property that is it's own property as well. without having deadlocks of reasoning.

So, the Reasoning on WEBVOWL can't state :From as a rdfs:Class, but as a rdf:Property.

C ya, gl hf

wouterbeek commented

@gabriellopes In my example, :simple is an instance of rdf:Property, while :From and :To are instances of rdfs:Class. The issue that I am reporting is that :To is displayed as a class (= correct), but :From is not (= incorrect).

gabriellopes commented

@gabriellopes In my example, :simple is an instance of rdf:Property, while :From and :To are instances of rdfs:Class. The issue that I am reporting is that :To is displayed as a class (= correct), but :From is not (= incorrect).

Where did you state that :From and :To are both classes? Because I think if it depends on the reasoning for solving that, the reasoner is going to conclude that :From is a rdf:Property instead, as the expected object for rdfs:domain class as default is a rdf:Property.

gl

wouterbeek commented

@gabriellopes I do not understand your remarks. :From and :To are clearly classes in my example. This is even stated in the snippet that you shared earlier (the rdfs:range of rdfs:domain is rdfs:Class).

gabriellopes commented

@wouterbeek sorry, my fault. I misunderstood your problem..

wouterbeek commented

@gabriellopes No problem! Just making sure we're on the same page ;-)

nandikajain commented

@wouterbeek Can I take up this issue?

prantikaC commented

has there been a solution to this?