Scorpion supports standard Perl Regular Expressions for matching strings,
mainly for filtering and activation uses in toolbox command strings.
Some common regular expression patterns:
^ST - match
strings starting with "ST"
ST$ - match strings ending with "ST"
^ST$ - match strings exactly "ST"
S. - match any string containing "S" followed by any non whitespace
S[1-9] - match any string containing "S" followed by 1 to 9
S[1,9] - match any string containing "S1" or "S9"
ST? - match any string containing "S" optionally followed by "T"
tool uses the regular expression in the advanced template activation