> On Mar 8, 2015, at 7:00 AM, Anthony Mallia <amal...@edmondsci.com> wrote:
> 
> So I am recommending two subtypes of Ontology :
> INSTANCE ONTOLOGY (INSTANCE for short) contains Individuals, their Property 
> assertions and their data values but may refer to contents of MODEL(s)
> MODEL ONTOLOGY (MODEL for short) contains Classes, ObjectProperties, 
> DataProperties and Datatypes
> 
> INSTANCE and MODEL are disjoint but there can be Ontologies (neither of these 
> subtypes) which combine them through merge or import and would be used for 
> reasoning.

 I am not sure you can make a clean distinction between “instance ontology” and 
“model ontology” by the type of entities in them. What about classes that are 
defined as enumerations of individuals? These individuals should be part of a 
model sanctioned by an authority such as HL7.

Perhaps the distinction should be made using the types of assertions and not 
types of entities, where a “data ontology” contains assertions about 
individuals’ types and their property values only, and a “model ontology” 
contains definitions of classes, properties, datatypes, and restrictions on 
them. Some individuals may be in a “model ontology” if they help to define 
classes.

With best regards,
Samson





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