Provides a pattern or expression specifying files or directories that should be included alongside the primary file.
An implementation must not fail workflow execution if required is set to false and the expected secondary file does not exist. Default value for required field is true for secondary files on input and false for secondary files on output.
Secondary files are specified using the following micro-DSL for secondary files:
* If the value is a string, it is transformed to an object with two fields pattern and required * By default, the value of required is null (this indicates default behavior, which may be based on the context) * If the value ends with a question mark ? the question mark is stripped off and the value of the field required is set to False * The remaining value is assigned to the field pattern
For implementation details and examples, please see this section
in the Schema Salad specification.