[Zope] How to avoid repeated records from an OR search in ZCatalog?

[Ausum]

As suggested by Caseman, it's possible in Zope 2.3 to do OR searches across
different indexes using Zcatalog. Like this:

<dtml-in expr="catalog(title=query) + catalog(summary=query)+
catalog(body=query) + catalog(notes=query)">
        ...........
</dtml-in>

The problem is that if the queried word is found at more than one index, then
its correspondant record will appear repeated as many times as the number of
indexes for the same document.

Has anybody dealed with this before? Is there a workaround (not using
PrincipiaSearchSource)?

Thanks in advance,


Ausum