Union

Synopsis

This operator builds the union of the input ExampleSets. The input ExampleSets are combined in such a way that attributes and examples of both input ExampleSets are part of the resultant union ExampleSet.

Description

The Union operator builds the superset of features of both input ExampleSets such that all regular attributes of both ExampleSets are part of the superset. The attributes that are common in both ExampleSets are not repeated in the superset twice, a single attribute is created that holds data of both ExampleSets. If the special attributes of both input ExampleSets are compatible with each other then only one special attribute is created in the superset which has examples of both the input ExampleSets. If special attributes of ExampleSets are not compatible, the special attributes of the first ExampleSet are kept. If both ExampleSets have any attributes with the same name, they should be compatible with each other; otherwise you will get an error message. This can be understood by studying the attached Example Process.

Input

example set 1

This input port expects an ExampleSet. It is the output of the Retrieve operator in the attached Example Process. The output of other operators can also be used as input. It is essential that meta data should be attached with the data for the input because attributes are specified in their meta data.

example set 2

This input port expects an ExampleSet. It is the output of the Retrieve operator in the attached Example Process. The output of other operators can also be used as input. It is essential that meta data should be attached with the data for the input because attributes are specified in their meta data.

Output

union

The union of the input ExampleSets is delivered through this port.