Github user vruusmann commented on the pull request:
https://github.com/apache/spark/pull/3099#issuecomment-61949888
@jegonzal PMML is essentially a domain-specific language (DSL) for the
domain of predictive analytic applications. It is commonly used only for the
representation of statistical and data mining models (ie. simple "model export"
functionality). But it can do much more, including chaining multiple models
together into a so-called model ensemble, implementing complex data pre- and
post-processing logic, adding annotations and machine-readable documentation to
the solution and so on.
I have a separate project in the works that deals specifically with
translating memory- and CPU-intensive parts of PMML documents into Java source
code for more efficient execution.
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