CWL document version. Always required at the document root. Not required for a Process embedded inside another Process.
A documentation string for this object, or an array of strings which should be concatenated.
The expression to execute. The expression must return a plain Javascript object which matches the output parameters of the ExpressionTool.
Declares hints applying to either the runtime environment or the workflow engine that may be helpful in executing this process. It is not an error if an implementation cannot satisfy all hints, however the implementation may report a warning.
The unique identifier for this object.
Defines the input parameters of the process. The process is ready to run when all required input parameters are associated with concrete values. Input parameters include a schema for each parameter which is used to validate the input object. It may also be used to build a user interface for constructing the input object.
When accepting an input object, all input parameters must have a value.
If an input parameter is missing from the input object, it must be
assigned a value of null (or the value of default for that
parameter, if provided) for the purposes of validation and evaluation
of expressions.
An identifier for the type of computational operation, of this Process. Especially useful for "class: Operation", but can also be used for CommandLineTool, Workflow, or ExpressionTool.
If provided, then this must be an IRI of a concept node that represents the type of operation, preferrably defined within an ontology.
For example, in the domain of bioinformatics, one can use an IRI from the EDAM Ontology's Operation concept nodes, like Alignment, or Clustering; or a more specific Operation concept like Split read mapping.
A short, human-readable label of this object.
Defines the parameters representing the output of the process. May be used to generate and/or validate the output object.
Declares requirements that apply to either the runtime environment or the workflow engine that must be met in order to execute this process. If an implementation cannot satisfy all requirements, or a requirement is listed which is not recognized by the implementation, it is a fatal error and the implementation must not attempt to run the process, unless overridden at user option.
Generated using TypeDoc
Auto-generated interface for https://w3id.org/cwl/cwl#ExpressionTool
An ExpressionTool is a type of Process object that can be run by itself or as a Workflow step. It executes a pure Javascript expression that has access to the same input parameters as a workflow. It is meant to be used sparingly as a way to isolate complex Javascript expressions that need to operate on input data and produce some result; perhaps just a rearrangement of the inputs. No Docker software container is required or allowed.