Databases Reference
In-Depth Information
Semantic modeling
Logical modeling
Derivation
Figure 10.2.
Example of derivation of semantic classes in data categories
In this example, semantic modeling does not include the
clustering of business objects in the form of categories; this is
a possible choice of modeling which then contents itself with
domains of business objects (Reality, Catalog, Portfolio,
Services Provided, Accounting). In this approach, the data
categories appear only in logical modeling.
The transversal domain, which collects the basic types of
data (simple and complex), can also be subject to
arrangement in the form of categories in order to facilitate
its organization. It is not always necessary to build in
categories for the administrative objects
4
, as there are a
smaller number of these than business objects. The
administrative objects are sufficiently far away from each
other from a semantic point of view to avoid the use of nested
4
. See Chapter 11 devoted to the modeling of an organization: the
administrative objects are similar to the business objects but concern
information relative to the description of the organization.
