Re: References to a value of an element in another element?

Original Message From: "Carl Eric Codere"

> Greetings,
>          What is the section in XML Schema 1.1 draft that explains this
> feature? If this feature is not currently possible in XML Schema, what 
> would
> syntax would you suggest?
>
> My goal here is to be able to describe binary file formats using XML 
> Schema,
> or any other scheman language (such as ASN.1, does ASN.1 this then?)...
>
> Any help would be appreciated...
> Carl

The section in the version of XSD 1.1 that I have that discusses this is 
"3.12 - Assertions".  It probably won't help you much though as this is work 
in progress and I doubt any tools support it.

You can find more about Schematron at: http://www.schematron.com/.  Although 
you can write XSD schemas that contain Schematron constraints I'm not sure 
how many mainstream parsing tools support this.

I have only limited experience of ASN.1.  To my knowledge ASN.1 does not 
support this type of constraint, but I could easily be wrong.

It may just be easier to make this an application level check!

HTH,

Pete.
--
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Pete Cordell
Tech-Know-Ware Ltd
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(or http://www.xml2cpp.com)
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