Most people are already familiar with the concept of using wildcards for filename expansion.
Regular expressions serve a similar purpose, but have the potential of being much more sophisticated, complicated, and powerful. It is beyond the scope or intent of this document to provide a full description of how to use regular expressions. A detailed discussion is often available in the UNIX man pages for ed, and the O'Reilly book UNIX in a Nutshell has a very nice chapter devoted to them. Razor's pattern matching technique is the same as that supported for ed. Since the filter panels of Razor do allow you to enter regular expressions, we offer here a quick table of some of the more familiar meta-characters.