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XML Schema: How to put restrictions on element names

Hi there,

I want to set up an XML Schema for documents of the following

The <root> node contains
- an optional <message> element with a text attribute, and
- arbitrary further content.

To make the parts unique, the top-level element of the further content
must not have the name "message". Therefore, this further content is
not completely arbitrary, but there is a restriction on the element


<message text="Hi there"/>
<purchaseOrder number="4711">
<item number="10" matnr="4033871" qty="10"/>

<message text="Only message"/>

<!-- only further content -->
<part number="10">
<option key="10" text="First option"/>
<option key="20" text="Second option"/>

In an imagined, non-existing XML Schema syntax, the further
content should be defined somehow like

<xs:restriction refType="xs:any">
<xs:condition test="local-name()!='message'"/>

Since I don't know how to do such a thing in the existing
XML-Schema language, I tried to use <xs:any> without restrictions.
But this didn't pass the XSD Validator, due to the non-uniqueness
of a possible message element:

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="root">
<xs:element name="message" minOccurs="0" maxOccurs="1">
<!-- leaving out attribute definitions for simplicity... -->
<xs:any minOccurs="0" processContents="skip"/>
<!-- ^^^^^ For this part, we need a restriction on the element
name!!! -->

Any suggestion how to define arbitrary elements
with restricted element name in XML Schema???


May 6 '06 #1
0 1115

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