XML Schema Problem

[Piet]

Folks,

I need to create a schema for legacy xml data where the
sequence of child elements is part of the semantics.
The problem is that I have no succeeded in creating a
schema that allows different child elements to apear in
arbitrary order. This was possible and simple with XDR,
but I have not found a way to describe this using X-
Schema.

The two following documents should be valid

<root>
<A/>
<A/>
<A/>
<B/>
<A/>
<B/>
</root>

<root>
<C/>
<A/>
<C/>
<B/>
<A/>
<A/>
</root>

[Colin Savage]

xsd:all ?

"Piet" <an*******@discussions.microsoft.com> wrote in message
news:06****************************@phx.gbl...

Folks,

I need to create a schema for legacy xml data where the
sequence of child elements is part of the semantics.
The problem is that I have no succeeded in creating a
schema that allows different child elements to apear in
arbitrary order. This was possible and simple with XDR,
but I have not found a way to describe this using X-
Schema.

The two following documents should be valid

<root>
<A/>
<A/>
<A/>
<B/>
<A/>
<B/>
</root>

<root>
<C/>
<A/>
<C/>
<B/>
<A/>
<A/>
</root>

[Piet]

-----Original Message-----
xsd:all ?

"Piet" <an*******@discussions.microsoft.com> wrote in messagenews:06****************************@phx.gbl...

Folks,

I need to create a schema for legacy xml data where the
sequence of child elements is part of the semantics.
The problem is that I have no succeeded in creating a
schema that allows different child elements to apear in
arbitrary order. This was possible and simple with XDR,
but I have not found a way to describe this using X-
Schema.

The two following documents should be valid

<root>
<A/>
<A/>
<A/>
<B/>
<A/>
<B/>
</root>

<root>
<C/>
<A/>
<C/>
<B/>
<A/>
<A/>
</root>

.

Thanks, but I am afraid it doesn't do it. The problem is
that the maxOccurs of each element in a "all" group is
constrained to 1.

[Colin Savage]

Wrap it in a repeating sequence?

"Piet" <an*******@discussions.microsoft.com> wrote in message
news:07****************************@phx.gbl...

-----Original Message-----
xsd:all ?

"Piet" <an*******@discussions.microsoft.com> wrote in

message

news:06****************************@phx.gbl...

Folks,

I need to create a schema for legacy xml data where the
sequence of child elements is part of the semantics.
The problem is that I have no succeeded in creating a
schema that allows different child elements to apear in
arbitrary order. This was possible and simple with XDR,
but I have not found a way to describe this using X-
Schema.

The two following documents should be valid

<root>
<A/>
<A/>
<A/>
<B/>
<A/>
<B/>
</root>

<root>
<C/>
<A/>
<C/>
<B/>
<A/>
<A/>
</root>

.

Thanks, but I am afraid it doesn't do it. The problem is
that the maxOccurs of each element in a "all" group is
constrained to 1.

[Oleg Tkachenko]

Piet wrote:

I need to create a schema for legacy xml data where the
sequence of child elements is part of the semantics.
The problem is that I have no succeeded in creating a
schema that allows different child elements to apear in
arbitrary order.

Use xs:choice for that.

<xs:choice maxOccurs="unbounded" minOccurs="0">
<xs:element name="A"/>
<xs:element name="B"/>
<xs:element name="C"/>
</xs:choice>

--
Oleg Tkachenko
XML Insider
http://www.tkachenko.com/blog