In Schema, how to say "If one element exist, another element must exist"?

09-16-2003

Hello All,

I have the following schema:
....
<xs:element name="data_type_id" type="xs:unsignedShort" />
<xs:element name="data_value" type="xs:anyType" />
....

What I want to do is to specify that "If 'data_value' element exists,
'data_type_id' element MUST exist".

How do I do that?

Thanks very much

09-17-2003

Y.S. schrieb:
> Hello All,
>
> I have the following schema:
> ...
> <xs:element name="data_type_id" type="xs:unsignedShort" />
> <xs:element name="data_value" type="xs:anyType" />
> ...
>
> What I want to do is to specify that "If 'data_value' element exists,
> 'data_type_id' element MUST exist".
>
> How do I do that?
>
> Thanks very much

Hi,

you should consider to embed data-value inside data_type_id either by
attribute
<data_type_id value="somewhat"/>
or by element
<data_type_id>
<data_value/>
</data_type_id>

That's wy xml is structured. I cannot imagine that these kind of checks
are possible with xml schemas but of cause I maybe wrong....

Hope I could help you

Thomas Scheffler

09-17-2003

Y.S. wrote:

>Hello All,
>
>I have the following schema:
>...
><xs:element name="data_type_id" type="xs:unsignedShort" />
><xs:element name="data_value" type="xs:anyType" />
>...
>
>What I want to do is to specify that "If 'data_value' element exists,
>'data_type_id' element MUST exist".
>
>How do I do that?
>
>Thanks very much
>
>
Use <sequence>
<xs:sequence minoccurs="0">
<xs:element name="data_type_id" type="xs:unsignedShort" />
<xs:element name="data_value" type="xs:anyType" />
</xs:sequence>

--
J. D. Addison
email

09-17-2003

Include both the elements within a sequence like the following:
=========
<xs:sequence minOccurs="0" maxOccurs="1">
<xs:element name="data_type_id" type="xs:unsignedShort" />
<xs:element name="data_value" type="xs:anyType" />
</xs:sequence>
==========

Regards.
"Y.S." <> wrote in message
news: om...
> Hello All,
>
> I have the following schema:
> ...
> <xs:element name="data_type_id" type="xs:unsignedShort" />
> <xs:element name="data_value" type="xs:anyType" />
> ...
>
> What I want to do is to specify that "If 'data_value' element exists,
> 'data_type_id' element MUST exist".
>
> How do I do that?
>
> Thanks very much

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