Simple question about xml schema

[Lian Liming]

Hi all,

I want to write a schema for the following example xml file:

<Items>
<ItemA>hehe</ItemB>
<ItemB>haha</ItemB>
</Items>

So far as my knowledge about xml schema, I can write the following
schema:

<element name="Items">
<complexType>
<sequence>
<element name="ItemA" type="string"/>
<element name="ItemB" type="string"/>
</sequence>
</complexType>
</element>

The problem is that, in this definition, the order of ItemA and
ItemB is fixed. If I want to make the order make no sense, in another
words, ItemB is allowed to appear before ItemA, how can I define the
schema?

This seems a simple question, but I really get confused. Thanks
for suggestion.

[Henry S. Thompson]

> I want to write a schema for the following example xml file:

<Items>
<ItemA>hehe</ItemB>
<ItemB>haha</ItemB>
</Items> <sequence>
<element name="ItemA" type="string"/>
<element name="ItemB" type="string"/>
</sequence>
The problem is that, in this definition, the order of ItemA and
ItemB is fixed. If I want to make the order make no sense, in another
words, ItemB is allowed to appear before ItemA, how can I define the
schema?

Use <all> instead of <sequence>.

See the W3C XML Schema Primer [1].

ht

[1] http://www.w3.org/TR/xmlschema-0/#groups
--
Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
Half-time member of W3C Team
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URL: http://www.ltg.ed.ac.uk/~ht/
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