Hi,

i'd like to validate my XML file (see below) using XML Schema.

Now my question: is it possible to limit the occurrence of the element
b in the data element.
I mean: data can contain up to 6 b elements, but it doesn't matter how
the b elements are allocated in the elements a and c.

Any help would be appreciated -- thank you!

XML File (shall be valid)
<data>
<a>
<b>...</b>
<b>...</b>
<b>...</b>
<b>...</b>
</a>
<c>
<b>...</b>
<b>...</b>
</c>
</data>

XML File (shall be valid too)
<data>
<a>
<b>...</b>
<b>...</b>
<b>...</b>
</a>
<c>
<b>...</b>
<b>...</b>
<b>...</b>
<b>...</b>
</c>
</data>

1-crm@freenet.de wrote:
[color=blue]
> Now my question: is it possible to limit the occurrence of the element
> b in the data element.[/color]

I don't think so, you can describe the contents of the a element and
there you can constraint the number of b child elements. The same is
possible for the c element.
But with the W3C XSD schema language I don't think you can specify
constraints on the number of b descendants of the data element.
Schematron however allows you to model such constraints.


--

Martin Honnen --- MVP XML
http://JavaScript.FAQTs.com/

Hi Martin,

This thought of mine WOULD be way to convoluted and schematron as you
say would be better.

However as an academic argument could the <xsd:choice> option be used
with each permutation covered

minOccurs="0"
minOccurs="6"

minOccurs="1"
minOccurs="5"

minOccurs="2"
minOccurs="4"

minOccurs="3"
minOccurs="3"

& so on

Assuming XML Schema was the only show in town

Dickster

dickster wrote:
[color=blue]
> However as an academic argument could the <xsd:choice> option be used
> with each permutation covered
>
> minOccurs="0"
> minOccurs="6"
>
> minOccurs="1"
> minOccurs="5"
>
> minOccurs="2"
> minOccurs="4"
>
> minOccurs="3"
> minOccurs="3"
>
> & so on[/color]

In my understanding even if you try to enumerate all choices the schema
becomes non-deterministic and thus that approach does not work.

--

Martin Honnen --- MVP XML
http://JavaScript.FAQTs.com/