http://docs.oracle.com/javase/6/docs/api/java/util/regex/Pattern.html to the /RegexTest.html servlet
to analyse the target servers: robots.txt table, mass target analysis and a regex tester
parser/crawler error page whenever a problem with regular expression occurs. This makes it easy to correct and enhance the must-match and must-not-match patterns just by trying out which pattern could be correct.
