XML ID question

[MIDON ALEXIS <AL...@sgam.com>]

Hi,

Does anyone know how to reduce the scope of an ID attribute?
I mean that xs:ID is an unique identifier for the whole message and I would
like to make it unique in a message sub-part.
example:
The following message contains 2 financial products. They describe deals
between the same 2 parties.
Since the xs:id are global, this message is not valid.

Solutions :

*	pull up parties in the <message> tag - Impossible due to business
limitations
*	add an xs:ID to the <product>, concatenate product id and party id -
dangerous since the same entities have different identifier
*	make ids unique in the scope of the <product> element. Is it
possible?


I know that my question is not in the real scope of this mailing list but I
also know that many of you are XML experts ;)
Thanks for your help.

Alexis.



<message>
        <product>
                ...
                <swap>
                        <notional>1 000 USD<notional/>
                        <party ref="128"/>
                        <party ref="256"/>
                </swap>
                <party id="128"/>
                <party id="256"/>
        </product>
        <product>
                ...
                <swap>
                        <notional>5 000 000 EUR<notional/>
                        <party ref="128"/>
                        <party ref="256"/>
                </swap>
                <!-- #######################
                        ID conflict
                ############################ -->
                <party id="128"/>
                <party id="256"/>
        </product>
</message>