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I am using Methontology as Methodology for the construction of a Ontology, in the task 7 for this methodology "Task 7: To define class attributes in detail", I know how to add the instance attributes in Protege but I don't know how to add the class attributes in Protege 5.0.

I send you the tables of class attributes and instance attributes, for show the diference between them

Atributes of class

Atributes of Instance

Antonio Edgar Martinez
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"Class attributes" that apply to the class rather than to instances of the class are modelled in OWL as annotation properties.

Ignazio
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  • How I model the class attributes in protege5? – Antonio Edgar Martinez Aug 25 '16 at 20:41
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    By using annotation properties on the class itself. Select the class and the option to add annotations should be enabled. – Ignazio Aug 26 '16 at 08:19
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    But how add this class atribute with the semantic of OWL?. Because in owl the annotatiosn don't have any semantics from OWL point of view. – Antonio Edgar Martinez Aug 29 '16 at 16:12
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    Owl semantics does not support class attributes; the only way to specify those with semantics attached is through punning, creating an individual with the same IRI as the class. – Ignazio Aug 29 '16 at 20:43
  • What would be the purpose of adding an annotation to a class. For instance, the class has max value 5. Why would someone do this besides documentation purposes? It has no meaning in OWL, right? – user3352632 Jun 17 '21 at 11:37
  • Exactly, for documentation. One could do something with the value but it would be a non standard extension to add semantic meaning via annotations. – Ignazio Jun 17 '21 at 11:40