An ad blocking list is a set of regular expressions, one per line, stored in a text file, with begin and end tags. Publishing a list is just a matter of putting it up on a web server. Regular expressions Regular expressions are substrings of the text you want to match, with a rich set of wildcard characters. Ad Extinguisher uses the GNU regexp library. Here I will only cover the basics.
Alphanumeric characters represent themselves.
Search is case insensitive. For example, the period means any character. If backslashed it means a period. Do not put this at the beginning and end of your expressions. This was found in beta testing.