In the actual ModificationRequestList parameter, MRs are separated by blanks, tab characters, or both. To delete an MR, precede the MR number with an ! (exclamation point). If the MR you want to delete is currently in the list of MRs, it is changed into a comment line. The cdc command places a list of all deleted MRs in the comment section of the delta and precedes them with a comment line indicating that the MRs were deleted.

If you do not specify the -m flag, and the v header flag is set, MRs are read from standard input. If standard input is a workstation, the cdc command prompts you for the MRs. The first new-line character not preceded by a backslash ends the list on the command line. The cdc command continues to take input until it reads an end-of-line character or a blank line. MRs are always read before comments (see the -y flag).

If the v header flag has a value, the cdc command interprets the value as the name of a program that validates MR numbers. If the MR number validation program returns a nonzero exit value, the cdc command stops and does not change the MRs.

If you do not specify the -y flag, the cdc command reads comments from standard input until it reads an end-of-file character. If the standard input is a workstation, the cdc command prompts for the comments and also allows a blank line to end input. If the last character of a line is a \ (backslash), the cdc command ignores it and continues to read standard input.

Note: If the cdc command reads standard input for file names (that is, when you specify a file name of -), you must use the -y and -m flags.