Greetings, you've already had some answers to your question but I'd like
to suggest that you consider the following approach:

<f:instance>
        <data>
                <pair>
                        <a>5</a>
                        <b>10</b>
                </pair>
        </data>
</f:instance>

<f:bind nodeset="/data/pair" constraint="/data/pair/a < /data/pair/b"/>
<f:bind nodeset="/data/pair/a" type="xsd:integer"/>
<f:bind nodeset="/data/pair/b" type="xsd:integer"/>

<f:group ref="/data/pair">
        <f:label>pair: </f:label>

        <f:input ref="/data/pair/a">
            <f:label>a: </f:label>
        </f:input>

        <f:input ref="/data/pair/b">
            <f:label>b: </f:label>
        </f:input>

</f:group>

This has the benefit from a users point of view that if the user wants to
change a and b to be 12 & 17 the intermediate state of a(12) and b(10)
will indicate that the value of a is invalid but it will indicate that
there is a problem with the pair.

Regards, Roland

"Vo, Thanh Chi" <ThanhVo@psv.com.vn>
Sent by: www-forms-request@w3.org
26/10/2004 07:16

To
"'www-forms@w3.org'" ,<www-forms@w3.org>
cc

Subject
Validate 2 fieds!.

Hi all,
Could you tell me how to make a validation like that:
value A < value B.
By schema I've just make value A, value B in a fix range( such as 0..255)
And by schema could we make a constrain like that( value A < value B).

--

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