Maintaining Valid Rule Definitions

Since rule definitions must be syntactically correct at all times, you must consider the following issues when specifying Line Editing commands:

• The result of a Line Editing command is dependent on the line on which the command is specified. For example, command D deletes either a single or a logical line based on the line type.
• Logical lines function as a unit and cannot be separated.

  When a logical command is specified within a logical line, that is, on a subparameter line, or a continuation line, the specified operation is performed on the entire logical line.

• Block commands must be specified on the main lines of the block. For example, to delete an ON block, specify command DB (Delete Block) on the ON line.
• Blank parameter lines added automatically by CMEM, to allow the user to specify additional parameters, cannot be deleted.
• BMC recommends that, wherever possible, you use commands D, C, R, and M for editing, instead of DS, DL, CS, CL, RS, RL, MS, and ML, because these commands automatically retain the logical structure of the rule definition.