[xmlschemata] Re: Support of warnings by schema languages

From: Anderson, John <John@Barbadosoft.com>
Date: Fri Jun 28 2002 - 10:04:41 UTC

Eric,

Isn't this what maxOccurs is intended for? If the schema allows un unlimited
amount of bars, and your implementation doesn't, then your implementation
isn't conformant to the schema.

How is this different to a schema which specifies:
<!ELEMENT foo (bar*,somethingElse)>
when your implementation doesn't store somethingElse at all?

Or am I missing something here?

John

> -----Original Message-----
> From: Eric van der Vlist [mailto:vdv@dyomedea.com]
> Sent: 28 June 2002 09:08
> To: xmlschemata@xmlschemata.org
> Subject: [xmlschemata] Support of warnings by schema languages
>
>
>
> Hi,
>
> Suppose I have a schema allowing zero or more "bar" elements within
> "foo":
>
> foo= element {element bar {text()} *}
>
> and suppose I have written an implementation with my favorite
> programming language which stores "bars" in an array with a length of
> five.
>
> A document with 6 bars is valid per the definition of the markup
> language but my implementation will not support it correctly.
>
> Isn't it one of the cases where it would be nice to have a notion of
> "warning" and add a third state to the result of a validation which is
> currently a binary true|false ?
>
> I have been thinking about it recently and although not
> obvious I think
> that this could be implemented at least as an extension in Relax NG by
> adding an optional foreign "warning" attribute to the
> alternatives of a
> choice: if the schema is valid per an alternative holding a warning
> attribute then the warning is raised.
>
> Anyway, before investigating further, the question is probably to know
> if there is a real requirement for this feature!
>
> What do you think?
>
> Eric
> --
> See you in San Diego.
>
http://conferences.oreillynet.com/os2002/
------------------------------------------------------------------------
Eric van der Vlist http://xmlfr.org http://dyomedea.com
(W3C) XML Schema ISBN:0-596-00252-1 http://oreilly.com/catalog/xmlschema
------------------------------------------------------------------------

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Received on Fri Jun 28 12:01:40 2002

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