I am writing an application that will FTP to and from an IBM running MVS. I want to check that MVS file id is valid, i.e. that is has the format aaaa.bbbb.cccc.dddd. That is that that each node (aaaa,bbbb,etc) is a most 8 characters, each node starts with a letter, ther is only one period "." between each node, does not end with a period, does not have spacces un the MVS file id. I have two questions:

1. Did I leave anything out?
2. What is the best (most efficent way of doing thsi?