List of Business Objects
A list of objects (or things or assets) in which the enterprise is interested. The list is a fairly high level of aggregation. The model defines the scope or boundaries, or the models of objects significant to the enterprise.
Semantic Model
A model of the actual enterprise objects (i.e., things, assets) that are significant to the enterprise. Typically, the semantic model would be represented as an entity/relationship model and would be at a level of definition expressing concepts (i.e., terms and facts) used in the significant business objectives/strategies implemented later as business rules.
Logical Data Model
It is a model of the logical representation of objects about which the enterprise records information, in either automated or non-automated form. It would be represented as a fully attributed, keyed, normalized entity relationship model reflecting the intent of the semantic model.
Physical Data Model
It is a technology constrained, or physical representation, of the objects
of the enterprise. The representation style of this model would depend
on the technology chosen for implementation. If relational technology
is chosen, this would be a model of the table structure required to support
the logical data model in a relational-style model. In an object-oriented
notation, this would be a class-hierarchy/association style model.
