2.2 Representation of the Logical Model

Each concept is represented by a row in the concept release file.

Each description is represented by a row in the description release file.

Each stated concept definition is represented by a set of rows in the OWL axiom reference set file, which follows the format of an OWL Expression Reference Set. Each row contains an axiom that forms part of the definition of the concept identified by the referencedComponentId.

Notes:

• As well as representing the definitions of individual concepts, the OWL axiom reference set represents characteristics of attributes including transitivity, reflexivity and property chains.
• The OWL ontology reference set also follows the OWL Expression Reference Set pattern. It contains general information about the terminology, which is required by a description logic classifier but is not subject to significant changes between release versions.

Each inferred concept definition is represented by a set of rows in the relationship release file. Each row in the set that defines a concept, represents a necessary, defining relationship with another concept. The definitionStatusId column in the concept file row indicates whether the set of defining relationships is sufficient to define the concept.

Represented by a range of reference set release files that conform to the extensible reference set file format.

Each row in a reference set refers to a concept or description as a member of the set.The extensible structure allows different types of related information to be associated with the referenced component.