Hi Pranay,
as Ted already said there were already multiple times the request for PMML
support.
I would recommend that you read all the JIRA issues about PMML they contain a
lot of information what have happened so far:
https://issues.apache.org/jira/browse/MAHOUT-1041 Support for PMML
See https://builds.apache.org/job/Mahout-Quality/2225/
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https://builds.apache.org/job/mahout-nightly/org.apache.mahout$mahout-integration/1342/