Some Useful REX Expressions

Thunderstone Search Appliance Manual

To locate phone numbers:

1?\space?(?\digit\digit\digit?)?[\-\space]?\digit{3}-=\digit{4}

To locate text between parentheses:

(=[^()]+)      <- without direction specification
     or
>>(=!)+)       <- with direction specification

To locate paragraphs delimited by an empty line and 4 spaces:

>>\n\n=\space\P{4}!\n\n\space\space\space\space+\F\n\n=\space{4}

To locate numbers in scientific notation; e.g., "-3.14 e -21":

[+\-]?\space?>>[0-9]+\.?[0-9]*\space?e?\space?[+\-]?\space?[0-9]+