create an alternate pageset dynamically

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Hey folks,

normally to create an alternate pageset one has to have these tags in
hosts.cfg on the lines where the servers should be added to the pageset.
Is it possible - lets say with xymongen - to create an alternate pageset
without having these tags in the config file?

In my case I want to create a pageset where all servers will be located
that have a special test and I don't want to edit hosts.cfg every time
when a new server gets the test or an old one loses it.

TIA
Torsten
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