Downgrading PMML 4.4 to PMML 4.2 about jpmml-h2o HOT 4 CLOSED

All JPMML conversion libraries (including the JPMML-H2O library) are generating PMML markup that conforms to the latest PMML schema/specification version. Currently it's PMML 4.4.

The main value of following the latest PMML schema version is that it allows me to generate a maximally concise/compact PMML markup.

You can perform the downgrade manually, by replacing all compact/concise PMML 4.4-specific fragments with more bloated PMML 4.2 one. This downgrade process has been automated for most common scenarios as a JPMML-Transformer library, but it's not publicly available.

from jpmml-h2o.

Are you interested in learning how to convert a PMML 4.4 GBM model to a PMML 4.2 GBM model manually?

For starters, replace the XML namespace declaration:

PMML 4.4:

<PMML xmlns="http://www.dmg.org/PMML-4_4" xmlns:data="http://jpmml.org/jpmml-model/InlineTable" version="4.4">
</PMML>

PMML 4.2:

<PMML xmlns="http://www.dmg.org/PMML-4_2" xmlns:data="http://jpmml.org/jpmml-model/InlineTable" version="4.2">
</PMML>

When done, try to import this fake PMML 4.2 file into your legacy software and see what happens. If there's an error, please share it with me here, and I'll advise what other PMML content tweaks might be necessary.

from jpmml-h2o.

There is an error in line 36, this is what line 36 has:

<MiningModel functionName="regression">

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There is an error in line 36, this is what line 36 has:

The MiningModel@functionName="regression" attribute is perfectly valid according to PMML 4.2:
http://dmg.org/pmml/v4-2-1/MultipleModels.html

Perhaps you should open a parallel issue with your legacy software vendor, and ask for their explanation. Perhaps they don't support the MiningModel element at all?

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