[dsdl-discuss] Fw: DSDL - Datatypes and Character Sets

Peter
 Re:
>Some thoughts on Datatypes and Character Sets.

>*Character Sets

>*Character sets can be considered a type of datatype. They both define a
> set of characters that are legal within an element or attribute.
> Therefore, I believe there is a case for combining these 2 areas into
> one task.

 I note the point, but would point out that situations exist where you want
 to check character sets independently of datatyping (e.g. to ensure that
 your output devices can handle the input) and that, therefore, we should
 allow this to be a separate process. I would agree, however, that it should
 be possible to use both datatypes and character repetoires in similar
 situations and see no reason why character repetoire definitions should not
 be used as data types within RELAX NG, etc, using existing mechanisms and a
 character repetoire resolver. All we need is someone to develop such a
 resolver. Alternatively we could add a mechanism to Part 5 to allow a
 character repetoire name to be used as a range indicator in a regular
 expression.

 Martin

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