date difference operation as a PMML preprocessing operation
The preprocessing functionality for the JPMML evaluator is a bit limited. One of the biggest lacks is that there are no date calculations.
This extends the pre-processing of the JPMML evaluator active fields according to the [DataDictionary] (http://www.dmg.org/v4-2-1/DataDictionary.html) and [MiningSchema] (http://www.dmg.org/v4-2-1/MiningSchema.html) elements:
For more information on jpmml, please see the [JPMML evaluator on github] (https://github.com/jpmml/jpmml-evaluator/).
mvn clean install
java -jar pmml-evaluator-example/target/example-1.2-SNAPSHOT.jar --model model.pmml --input input.csv --output output.csv
You might want to try out the provided example PMML file in pmml-extension/src/main/resources/.