1. A command method for a command driven computer system, the command method comprising: presenting a list of command driven computer program products in response to activation of the command method; presenting a logical tree comprising commands, related operands, sub-operands and related parameters for a command driven computer program product in response to receiving a selection of the command driven computer program product from the list of command driven computer program products; identifying, in the commands, related operands, sub-operands and related parameters of the logical tree that is presented, parameters that can be overwritten and parameters that have predefined values; and identifying, in the commands, related operands, sub-operands and related parameters of the logical tree that is presented, other operands and sub-operands that are unavailable for selection in response to receiving a selection of an operand or a sub-operand in the logical tree.
2. The method according to claim 1 wherein presenting a logical tree comprising commands, related operands, sub-operands and related parameters for a command driven computer program product in response to receiving a selection of the command driven computer program product from the list of command driven computer program products comprises: identifying, in the commands, related operands, sub-operands and related parameters of the logical tree that is presented, operands and sub-operands that are unavailable for selection and operands and sub-operands that are available for selection.