Nortel Networks 4050 Allowed regular expressions and escape sequences, String Usage Expressions

388Chapter 9 Customizing the portal and user logon

Table 75 lists the regular expressions and escape sequences you can use in an Exclude List entry. The set of allowable regular expressions is a subset of the set found in egrep and in the AWK programming language. The escape sequences are allowed in Erlang strings.

Table 75 Allowed regular expressions and escape sequences

String	Usage
Expressions
c	Matches the non-metacharacter c.
\c	Matches the literal character c (see escape sequence).
.	Matches any character.
^	Matches the beginning of a string.
$	Matches the end of a string.
[abc...]	Character class, which matches any of the characters abc....
	Character ranges are specified by a pair of characters separated by a
	hyphen (-).
[^abc...]	Negated character class, which matches any character except abc....
r1r2	Alternation — matches either r1 or r2.
r1r2	Concatenation — matches r1 and then r2.
r+	Matches one or more r’s.
r*	Matches zero or more r’s.
r?	Matches zero or one r’s.
(r)	Grouping — matches r.
Escape sequences
\b	backspace
\f	form feed
\n	newline (line feed)
\r	carriage return
\t	tab
\e	escape
\v	vertical tab
\s	space
\d	delete

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