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There are a lot of good news about query builder on Windchill 11.0.
Take a look at this document starting from page 56
http://support.ptc.com/WCMS/files/169116/en/PTCWindchill11.0F000WhatsNew.pdf
Or find the same info at this direct link in the 11.0 help center:
Basically what I see there is that the Java applets for Query Builder has been replaced with a HTML based UI. Not exactly BIG but nonetheless another necessary evolutionary step
Thanks for posting this, Marco. I looked through the whole document, and looks like a good upgrade to various areas.