re:Modeling Address using Relational Theory
- From: peter.crabb-wyke@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx (piatkow)
- Date: Sat, 03 Dec 2005 02:10:54 -0600
Coming in after 5 pages of posts is a little difficult but a few
points from my experience are:
1. Line based addressing is a time bomb as a business user will come
back later for some sort of geographical based reporting that will
require parsing every line.
2. Address formats are determined nationally but all the elements can
be analysed and defined. Formatting would have to be handled
programatically using rules based on target country.
3. Input of address data is normally by very junior clerical staff (or
direct by customers) without any understanding of the technicalities.
Lots of scope for data quality issues
4. In the UK at least issues of local pride may mean that customers
can get upset when mail is not addressed in the format that they
specify.
The practicalities of these requirements mean that implementation ends
up as a hybrid between structured and free format addressing.
Is it worth modelling addresses "properly"? I think it is as the
designer should always understand what compromises are being made and
what the risks and issues of those compromises are. Just don't expect
to implement the model into a database exactly as it stands.
.
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