Databases Reference
In-Depth Information
Example of address
Territory Office
Territory
US 90001
01
900
UK M1 1AA - Several “Territory
Offices” are used.
M (postal code),
1 (postal district),
1 (sector), AA (unity)
na
France 69130
130
69
Table A.1.
Address standards for sample countries
Once the semantic model has been validated, a derivation
towards the logical model occurs in order to take into
particular account the loose coupling of data (with the help of
data categories), their formal naming and performances.
A.1. The semantic model
− The
Period
class specifies the periods of address
validity.
− The
Object
class is an abstraction of real world objects:
person, building, organization, material assets, etc. All these
objects are susceptible to have addresses.
− The
Site
concept enables the declaration of several
expressions in a same address depending on the language.
This need appears for certain multi-language countries, for
instance Belgium. The qualifying attribute
language
,
attached to the
Site
class, enables the expression of this
mechanism. This possibility could also be useful for the
alternative representations of the address, for example in an
electronic language.
It is necessary to note that
Site
is an associative class
between an object and a period. Consequently, each site
instance only exists for one and only one value concept
[
Object
,
Period
].
