SDF-A offers the following facilities:
definition of user commands, implemented via command procedures, and modification of such definitions
definition of user programs and the statements to them, and modification of such definitions
disabling of commands, programs, statements, operands and operand values
modification of default values
renaming of domains, of command, statement and operand names, and of operand values that are keywords
modification or replacement of help texts for guided dialog, e.g. replacement of German help texts by those in the appropriate local language
modification of the assignment of commands to domains, and definition of new domains
modification of the default values of SDF options, e.g. for guided dialog
deletion and reconstruction of command and statement definitions