Pattern Match Validation Not Working

We do not compile a list of validation expressions for use with naturalForms.

Instead, we support those that can be found on numerous regular expression sites.

We recommend testing any pattern match rule prior to adding it to naturalForms.

Sites we find useful:

http://www.regexlib.com/ - library of valid expressions

http://www.freeformatter.com/regex-tester.html - ability to test expressions