The mvs_definition identifies a keyword that is generated by the host and, for Default and some Mapping statements, its associated parameter. It follows this format:

Note: In Control Statements, mvs_definitions, controls, and infoprint_definitions themselves cannot contain any white space (spaces or tabs). The first occurrence of white space separates the mvs_definition from the control and the second separates the control from the infoprint_definition. As a result, if the elements contain white spaces, the DCF will not complete the mapping correctly.
These values are described below.