The following describes only the most frequently used options in regular expressions. For a further introduction to regular expressions refer to the following sources:
http://download.oracle.com/javase/tutorial/essential/regex/
http://download.oracle.com/javase/6/docs/api/java/util/regex/Pattern.html
Regular Expressions, 3rd Edition, published by O´Reilly
The regular expressions used in EEC comply with the implementation of the programming language Java. It should be noted that in EEC-strings, the backslash character (\) needs to be quoted. I.e. in regular expressions with a backslash two of them are to use (\\).