Re: [higgins-dev] Which ontology to reference

[David Kuehr-McLaren <dkuehrmc@xxxxxxxxxx>]

Paul, 

Thanks.  That makes it more clear.
 But now I am confused by the relationship of HOWL to IdAS.  IdAS
only returns Entities.  In order to build an ontology for my context
provider that uses the HOWL objects, it appears I will need to add the
Agent object (as well as other objects types) to my own exstension of the
CDM, in order to treat the Agent objects as Entities.  Is that the
correct approach for building the schema for a context provider?

Thanks, 

David 

David Kuehr-McLaren 
Tivoli Security
919.224.1960

Paul Trevithick <ptrevithick@xxxxxxxxx>
Sent by: higgins-dev-bounces@xxxxxxxxxxx

04/09/2009 05:25 PM

Please respond to
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Subject	Re: [higgins-dev] Which ontology to reference

Hi David,

That was confusing indeed! I have replaced the word “Entity” in the second
sentence with the word “Agent.” 

[All classes (including Agent) and instances thereof in higgins.owl 1.1
are types of Higgins Entities. But when modeling in OWL we don’t directly
use Entity directly. ]

--Paul

On 4/9/09 3:48 PM, "David Kuehr-McLaren" <dkuehrmc@xxxxxxxxxx>
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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