We have the ability to (un)marshall PMML XML into a PMML object model.

The current unmarshaller used in the PMML Linear Regression Model viewer is based on npm modules cxml and cxsd. The PMML Scorecard (un)marshaller uses jpmml server-side and a combination of jpmml-model, xml-js and jsonata client-side.

Work within KieGroup (by dtikhomi@redhat.com) is underway to provide a generic single-source(code) (un)marshaller implementation. We will need to refactor the PMML/Linear Regression/Scorecard (un)marshallers accordingly.