http://blogs.msdn.com/b/ericlippert/archive/2005/12/22/regular-expressions-from-scratch-part-eleven-eliminating-multi-symbol-rules.aspxThe story so far: we have deterministic and nondeterministic finite automata. DFAs follow a rigid, fully specified set of rules which, on any string, yield either an accept or reject state after exactly as many moves as the string has characters.en-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.msdn.com/b/ericlippert/archive/2005/12/22/regular-expressions-from-scratch-part-eleven-eliminating-multi-symbol-rules.aspx#543298Sat, 04 Mar 2006 02:29:41 GMT91d46819-8472-40ad-a661-2c78acb4018c:543298Dan Sellers's WebLogWhen it comes to validating input regular expression becomes a very important part of your security plan.&amp;amp;nbsp;...<img src="http://blogs.msdn.com/aggbug.aspx?PostID=543298" width="1" height="1">http://blogs.msdn.com/b/ericlippert/archive/2005/12/22/regular-expressions-from-scratch-part-eleven-eliminating-multi-symbol-rules.aspx#538820Fri, 24 Feb 2006 23:07:39 GMT91d46819-8472-40ad-a661-2c78acb4018c:538820Testing&lt;input type=&quot;button&quot;&gt;<div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=538820" width="1" height="1">http://blogs.msdn.com/b/ericlippert/archive/2005/12/22/regular-expressions-from-scratch-part-eleven-eliminating-multi-symbol-rules.aspx#536731Wed, 22 Feb 2006 12:18:36 GMT91d46819-8472-40ad-a661-2c78acb4018c:536731Synesthesia » Links Roundup for 2006-02-21PingBack from <a rel="nofollow" target="_new" href="http://www.synesthesia.co.uk/blog/archives/2006/02/22/links-24/">http://www.synesthesia.co.uk/blog/archives/2006/02/22/links-24/</a><img src="http://blogs.msdn.com/aggbug.aspx?PostID=536731" width="1" height="1">