Cisco TelePresence Administrator's Manual page 362

(...) Groups a set
of matching
characters
together.
Groups can
then be
referenced in
order using
the characters
\1, \2, etc. as
part of a
replace string.
| Matches
against one
expression or
an alternate
expression.
\ Escapes a
regular
expression
special
character.
^ Signifies the
start of a line.
When used
immediately
after an
opening
brace,
negates the
character set
inside the
brace.
$ Signifies the
end of a line.
(?!...) Negative
lookahead.
Defines a
subexpression
that must not
be present.
(?<!...) Negative
lookbehind.
Defines a
subexpression
that must not
be present.
Note that regex comparisons are not case sensitive.
For an example of regular expression usage, see the
Cisco VCS Administrator Guide (X7.1)
A regular expression can be constructed to transform a URI containing a user's full name
to a URI based on their initials. The regular expression (.).*_(.).*(@example.com)
would match against the user john_smith@example.com and with a replace string of
\1\2\3 would transform it to js@example.com
.*@example.(net|com) matches against any URI for the domain example.com or the
domain example.net
[^abc] matches any single character that is NOT one of a, b or c
^\d\d\d$ matches any string that is exactly 3 digits long
(?!.*@example.com$).* matches any string that does not end with @example.com
(?!alice).* matches any string that does not start with alice
.*(?<!net) matches any string that does not end with net
CPL examples
Reference material
section.
Page 362 of 479