To illustrate the possiblities of this approach, we will discuss it
by an case study.
The e-mail example is a artificel one and has no real-life
relation.
Imagine, that you are in charge to implement a mail-program.
Of cource, you will use for the realization XML technology and you will formulate the email with xml.
One of jobs we have to do, is to take serveral guidelines for the email exchange into account:
| | Due to some restriction, the subject shouldn't be longer than 32 characters.
|
| | Every mail must have a subject
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| | External mail will only be accepted if the sender is stored in a internal database table.
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This case study now formulate these requirements with a DCI and show a possible implementation.
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