The default action is to replace the existing name or description with your new one, but by using the qualifier '-append' what you enter is appended to the existing name or description. Note that is you append to a description, no space is inserted by default bewteen the existing description and your appended text - you have to put in a space yourself if you require one. This allows you to append the name or description you have given on to the end of the existing name or description of the sequence. No No Input file format Normal sequence. The sequence file with a changed name or description.
Data files None.
Diagnostic Error Messages None. It always exits with status 0. Known bugs None noted. This program is intended to be used by everyone and everything, from naive users to embedded scripts.