xml-schema question

[rudie]

Hi
I´m having trouble with my xml schema.

My problem is that I want the element "PREMIE" to be able to occur several times. The other elements has to be independent of order. The element names are in swedish but that shouldn´t be a problem.
Here is the .xsd-file:

<xs:element name="BIL">
<xs:complexType>
<xs:all>
<xs:element name="TRAFIKBONUS" minOccurs="0">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:maxLength value="2" />
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="BILMERKESKOD" minOccurs="0">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:maxLength value="6" />
</xs:restriction>
</xs:simpleType>
</xs:element>
<!-- ref -->
<xs:element ref="PREMIE" />
<xs:element ref="RABATT" />
</xs:all>
</xs:complexType>
</xs:element>

I really need this to work.
Thanks!

[jkmyoung]

Can you change you <xs:all> to a <xs:sequence> instead?

Then you can have a nested sequence

<xs:sequence>
   ...
   <xs:sequence>
       <xs:element ref="PREMIE" maxOccurs="unbounded"/>
   </xs:sequence>
   <xs:element ref="RABATT" />
</xs:sequence>
 

inside this sequence.

[rudie]

Thanks for your reply. If I do like you say the order of the elements befor the "nested sequence" will matter. That is the whole problem.
I´d be happy for more input.

[jkmyoung]

I was afraid you were asking for that:
http://www.thescripts.com/forum/thread88016.html

Really, the problem is that this is easier to express as a context free grammar, instead of a regular expression. The regular expression that describes your structure is ugly.
eg, renaming the elements a, b, c, d the regular expression might look something like:
c*dc*( (ac*)?(bc*)? | bc*ac*) |
c*ac*bc*dc* |
c*bc*ac*dc* |
c*ac*dc*(bc*)? |
c*bc*dc*(ac*)?

If you really want to enforce this criteria, you might be better off switching to RELAX NG, or schematron, or some other tool.

[rudie]

Ok thanx.
I guess there´s no easy way then.