Ray,



If you have a lot of interdependencies and contextual rules - you may
want to look at augmenting your simple schema with a real rules
validation engine that uses XPath expressions.



See http://www.jcam.org.uk



DW

===============================

Ray Cauchi wrote:

Hi folks

  

I have defined a W3C XML Schema that allows markup of Policy documents.
(BTW - I am new at schema design!)

  

A valid xml structure follows:

  

  <?xml
version="1.0" encoding="UTF-8"?>

  <policy
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="myschema.xsd">

  <x-tab>        </x-tab><section>

  <x-tab>        </x-tab><x-tab>        </x-tab><title>Section
1
Title</title>

  <x-tab>        </x-tab><x-tab>        </x-tab><clause>string
text</clause>

  <x-tab>        </x-tab></section>

  <x-tab>        </x-tab><section>

  <x-tab>        </x-tab><x-tab>        </x-tab><title>Section
2
Title</title>

  <x-tab>        </x-tab><x-tab>        </x-tab><clause>string
text</clause>

  <x-tab>        </x-tab><x-tab>        </x-tab><clause>more
text</clause>

  <x-tab>        </x-tab></section>

  <x-tab>        </x-tab><section>

  <x-tab>        </x-tab><x-tab>        </x-tab><title>Section
3
Title</title>

  <x-tab>        </x-tab><x-tab>        </x-tab><clause>text
-
  <link
href="http://www.website.com/">a
link</link></clause>

  <x-tab>        </x-tab></section>

</policy>

  

  So you can see that each main section of a document is marked
up
as a <section></section>, and each section must have a
<title></title>

  

No problem, the schema works fine as far as I have so far
tested.

  

What I wish to do though, is enforce two specific <section>'s :
in
other words, the first <section> in each document will always
have
a specific <title>. That being, for arguments sake,
<title>Section 1: Policy Purpose</title>.

  

Similarly, the second section will also have a specific title - that
being <title>Section 2: Document Glossary</title>

  

All other <title>'s used in a document will be required (where
they
exist), but their content will not be fixed.

  

I have made <title></title> a global element. How can i now
instantiate it twice, with specific content, once for each section?? I
am
using the XMLSpy">XMLSpy schema GUI tool, and each time I try to provide a
fixed
value, that value becomes global...and thus applies to all
<title>
tags in the document. I am using the <title> element in the
following elements - hence its global definition :

  

<section>

<part>

<hmajor> (major heading)

<hminor> (minor heading)

  

  

  

Do I need to create a <s1title> and <s2title> separate to
my
original <title> element, or is there a more clever way of
approaching this issue? I am thinking there is but I am a tad stumped!
Any assistance would be hugely appreciated.

  

  

  <x-sigsep></x-sigsep>
  Best Regards

  

Ray Cauchi

  Manager/Lead Developer

  

  

  

  

  ( T W E E K ! )

  PO Box 468 Katoomba NSW
Australia 2780

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