On Wed, 1 Jul 2009 15:35:54 -0700 (PDT), MaggotChild
<hsomob1999@y...> wrote:

>On Jul 1, 7:57 am, "Neil Smith [MVP Digital Media]" <n...@nospam.com>
>wrote:
>> Hm I've had a think about this, and it's not obvious that XSD contains
>> the feature you want (referencing the content of an attribute to
>> determine the validation rule required)
>>
>> So it seems you may have to use a 2-pass approach.
>>
>> A way to consider it with XSL, would be to validate your primary
>> document structure first. Then transforming the doc to include
>> xsi:type based on each matching Detail node's Name attribute; and
>> finally validating using the xsi:type specified
>
>The problem is that cost is a required element.
>
><Detail Name="Cost" Value="25.99"/>
>
>becomes, say
>
><Detail Name="Cost" Value="25.99" xsi:type="Cost"/>
>
>How do I say a certain XSI type is required? I don't think I can.


A guy in a comment right at the bottom of this page
http://norman.walsh.name/2004/01/29/trainwreck
referred to a preceding comment stating XML schema or DTD can't do
this (a step matching your proposal) but RelaxNG can.

I don't know much about RelaxNG though.

It seems from the little I know about Schematron, that you may just be
able to embed the schematron rules in the XSD, then post-process
(again a second step) using a Schematron processor - I know there's a
class to do this I've seen written in PHP4 but not (so far) ported to
PHP5 or 6.

HTH
Cheers - Neil
------------------------------------------------
Digital Media MVP : 2004-2009
http://mvp.support.microsoft.com/mvpfaqs