To invoke the REX regular expression pattern matcher within a query precede the expression with a '/' (forward slash).
Examples:
Expression Purpose --------------------------------------------------------------------------- /19[789][0-9] Find years between 1970 and 1999 /[1-9][01][0-9]-?[0-9]{3}-=[0-9]{4} Any USA Phone Number /\n=\space+Clinton Find 'Clinton' as the first word in a Paragraph /\upper=\lower+\space\upper=\lower+ Proper Names without initials like: John Smith /(abc904) finds '(abc904)' anywhere it existsback up