Hi David,

That was confusing indeed! I have replaced the word ³Entity² in the second
sentence with the word ³Agent.²

[All classes (including Agent) and instances thereof in higgins.owl 1.1 are
types of Higgins Entities. But when modeling in OWL we don¹t directly use
Entity directly. ]

--Paul

On 4/9/09 3:48 PM, "David Kuehr-McLaren" <[email protected]> wrote:

> 
> I am having trouble understanding the instructions to Context Provider authors
> regarding extending the higgins ontology as per the Context Data Model 1.1
> page.  (I apologize in advance, if this is a basic OWL question or is
> documented elsewhere on the wiki)
> 
> http://wiki.eclipse.org/Context_Data_Model_1.1#Building_on_higgins.owl_1.1
> 
> In the section "Building on higgins.owl 1.1 " it states
> 
> " Developers must create specialized ontologies based on HOWL that describe
> specific concrete domains.For example, if a developer wanted to describe a CRM
> database, she would create an OWL ontology that would describe the data
> objects in the CRM database. This CRM database is called a Context in Higgins.
> If, for example, the database contained records about customers and those
> customers had full-names and email addresses, then the developer would define
> "Customer" as a sub-class of Entity and "full-name" and "email" as kinds of
> Attributes." 
> 
> The first sentence implies the developer should be using the "upper" ontology
> higgins1.1 owl.  But the last sentence tells the developer to reference the
> CDM and subclass Entity.  Intuitively, I think i would want to subclass Person
> from HOWL for a Customer object.  But Agent does not seem to subclass Entity.
> 
> When I use OWL modeling tools like SWOOP or Protoge, I can not figure out how
> to subclass Agent as an Entity.
> 
> Thanks for any guidance,
> 
> 
> David 
> 
> David Kuehr-McLaren
> Tivoli Security
> Identity Integration Architecture
> 919.224.1960 
> 

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