Github user pferrel commented on the issue:
https://github.com/apache/incubator-predictionio/pull/269
I think this is ready for review.
The main things here are changes to support trimming data in the PEvents
and LEvents somewhat like the formerly experimental Cleanup App did. Also
compacts $set/$unsets and dedups, all optional to support templates that do not
want certain of these features. Also the use of this feature is a trait that
must be added to a template to be used at all. So should have no effect on
existing templates unless they are altered. Then afaik it should work for all
of them.
Some minor libs were upgraded.
Some docs we modified to add information.
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