nl_tokens: A link between a parameter and the data for that parameter . The data for the parameter is available as in the preferred type and as an Argument for the CLI . <p > We also record validity information where applicable . <p > For values null and undefined have distinct definitions . null means that a value has been provided undefined means that it has not . Thus null is a valid default value and common because it identifies an parameter that is optional . undefined means there is no value from the command line .
pl_tokens: <mask> Assignment ( param , requisition ) { this . param = param ; this . requisition = requisition ; this . setValue ( param . defaultValue ) ; }