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Overview

Yellowfin’s PMML transformation step allows users to import data science models stored in a PMML file format into Yellowfin and then apply them on data to generate results, such as predictions. The step works within Yellowfin’s data transformation module by creating a transformation flow.

In order to use this transformation step, you will first need to install a PMML plug-in in your BI platform. Once that has been installed, you will be able to see a new PMML step in the data transformation module’s transformation list. This transformation step will be used to integrate and apply your PMML model. Click <here> to learn more about installing plugins.

It will be ideal to get a better understanding of the data transformation module before continuing with this guide.

 

Required Transformation Steps

The data transformation module creates transformation flows by using different “steps”. For this procedure, it will require at least 2 types of steps:

Note: You can add more steps to your flow, but require at least the first two for the PMML model to generate results.

  • An input step to extract data from a data source and load it into Yellowfin. This is the data that you want to use for your model, so ensure that you have access to the data source, and that the data is in the correct format. There are various ways of extracting data using the different types of input steps, all of which are supported for the PMML step. Refer to <this section> to understand how to use and configure these steps.
  • A PMML transformation step. This step will generate the output that your PMML model is designed to produce (such as making predictions based on your data). This works by loading your model (saved in a PMML file) into the Data Transformation module and applying it to the data from the previous step (i.e. the one it is connected to). You will need to configure this step to match input fields and specify the output fields. (Note: This step only appears in the transformation step list once you have installed the required PMML plug-in into Yellowfin.)

Note: An output step will be needed if you wish to store the result of the PMML model in a writable database.

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