Databases Reference
In-Depth Information
10.5.2.4.
Associative class in the same category
Semantic model
Logical model
InfoCl as sA
InfoCl as sC
lstClassesC [*] : InfoClassC
lstClassesC [*] : InfoClassC
idClassA : real
idClassB : real
idClassA : real
idClassB : real
InfoCl as sB
lstClassesC [*] : InfoClassC
lstClassesC [*] : InfoClassC
Figure 10.6.
Associative class derivation within the same category
Each occurrence of the associative class “ClassC” exists
for a single couple “ClassA” and “ClassB”. The logical data
modeling brings to light the use of keys for the data type,
“InfoClassC”, and multi-occurrence nested data types for
“InfoClassA” and “InfoClassB”.
10.5.3.
Derivation of elementary business operations
Elementary business operations overload the CRUD
services brought by the MDM system and ensured by default
with each business object. The designer assembles the
elementary business operations in order to declare them in
the form of a single service, located in pre- or post-condition
of CRUD services implicated in modifications that must be
made.
