Expression-class {sevenbridges} | R Documentation

## Expression Class

### Description

Define an expression that will be evaluated and used to modify the behavior of a tool or workflow. See Expressions for more information about expressions and ExpressionEngineRequirement for information on how to define a expression engine.

### Fields

`engine`

  (JsonPointerORcharacter) Either cwl:JsonPointer or a reference to an ExpressionEngineRequirement defining which engine to use.

`script`

  (character) The code to be executed by the expression engine.

### Examples

    Expression(engine = "#cwl-js-engine", script = "$job.inputs['threads']")

[Package sevenbridges version 1.10.5 Index]