Nortel Networks 4050 manual Constructs for string based regular expressions Sheet 1

340Chapter 7 TunnelGuard SRS Builder

Table 67 describes supported constructs for string-based regular expressions.

Table 67 Constructs for string based regular expressions (Sheet 1 of 2)

String regular expression	Description
x	The character x
.	Any character
\\	The backslash character
\0n	The character with octal value 0n (0 <= n <= 7)
\xhh	The character with the hexidecimal value 0xhh
\t	The tab character (‘\u0009’)
\n	The newline (line feed) character (‘\u000A’)
\d	A digit: [0-9]
\D	A non-digit: [^0-9]
\s	A whitespace character: [\t\n\x0B\f\r]
\S	A non=whitespace character: [^\s]
\w	A word character: [a-zA-Z_0-9]
\W	A non-word character: [^\w]
[abc]	a, b, or c
[^abc]	not a, b, or c
[a-z]	any character a through z
[a-d[m-p]]	a through d, or m through p: [a-dm-p] (union)
[a-z&&[def]]	d, e, or f (intersection)
[a-z&&[^bc]]	a through z, except for b and c: [ad-z] (subtraction)
X?	X, once or not at all
X*	X, zero or more times
X+	X, one or more times
X{n}	X, exactly n times
X{n,}	X, at least n times
X{n,m}	X, at least n but not more than m times
\	Nothing, but quotes the following character
\Q	Nothing, but quotes all characters until \E
\E	Nothing, but ends quoting started by \Q
^	The beginning of a line

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