Defining different elements in XML Schema

[fulvio.risso@gmail.com]

Hello guys.

I would like to use the following two types of elements in my XML file:

<field type="fixed" size="10"/>
<field type="variable" expr="a+b"/>

The problem is that I cannot find a way to define the proper XML
schema. The problem is that I would like to define an element
("<field>") which may have different syntax according to the value of
one of its attribute. It seems to me that a solution is to use
"xsi:type=. .." in the XML file, but I don't want to do that.

Does anybody have a solution for this (maybe stupid) problem?

Cheers,

fulvio

[Soren Kuula]

Re: Defining different elements in XML Schema

fulvio.risso@gm ail.com wrote:
[color=blue]
> Does anybody have a solution for this (maybe stupid) problem?[/color]

Hi,

The stupid one is not you..

You can't specify the dependence of anything on attribute values in XML
Schema.

Relax NG can do it, and it's a much nicer language to work with (my
opinion anyway).

Soren

[Stan Kitsis [MSFT]]

Re: Defining different elements in XML Schema

Can you use this instead?

<fields>
<fixed size="10"/>
<variable expr="a+b"/>
</fields>

--
Stan Kitsis
Program Manager, XML Technologies
Microsoft Corporation

This posting is provided "AS IS" with no warranties, and confers no rights.

<fulvio.risso@g mail.com> wrote in message
news:1128602594 .461823.80710@g 43g2000cwa.goog legroups.com...[color=blue]
> Hello guys.
>
> I would like to use the following two types of elements in my XML file:
>
> <field type="fixed" size="10"/>
> <field type="variable" expr="a+b"/>
>
> The problem is that I cannot find a way to define the proper XML
> schema. The problem is that I would like to define an element
> ("<field>") which may have different syntax according to the value of
> one of its attribute. It seems to me that a solution is to use
> "xsi:type=. .." in the XML file, but I don't want to do that.
>
> Does anybody have a solution for this (maybe stupid) problem?
>
> Cheers,
>
> fulvio
>[/color]

[Priscilla Walmsley]

Re: Defining different elements in XML Schema

Hi,

Just out of curiosity, why don't you want to use xsi:type? It's a
simple matter of adding a namespace declaration in your document, and
prefix to your type attributes:

<field xsi:type="fixed " size="10"/>
<field xsi:type="varia ble" expr="a+b"/>

Priscilla

----------------------------------
Priscilla Walmsley
Author, Definitive XML Schema

http://www.datypic.com

----------------------------------

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