Apply One Expression to Many Attributes | ExpressionEvaluator

Introduction

The task here is to take an Excel table of voting data and apply an expression to 4 of the attributes to change them from a total value to a percent value based on the number of total voters.


Excel Data Before Transformation


Excel Data After Transformation

In the ExpressionEvaluator, the @CurrentAttribute() function in FME 2015.0 or later is used to get the current value of the attributes chosen, apply the expression and replace them with the newly calculated value.


ExpressionEvaluator Settings

Other examples of using CurrentAttribute would be to:

• apply the same date/time format to several date/time attributes
• apply a math function like round() to several attributes

CurrentAttribute is also available in the AttributeConcatenator