Regular Expressions - Cisco TelePresence Administrator's Manual

Regular expressions

Regular expressions can be used in conjunction with a number of VCS features such as alias
transformations, zone transformations, CPL policy and ENUM. The VCS uses POSIX format regular
expression syntax. The table below provides a list of commonly used special characters in regular
expression syntax. This is only a subset of the full range of expressions available. For a detailed description
of regular expression syntax see the publication Regular Expression Pocket Reference.
Character Description
. Matches any
single
character.
\d Matches any
decimal digit,
i.e. 0-9.
* Matches 0 or
more
repetitions of
the previous
character or
expression.
+ Matches 1 or
more
repetitions of
the previous
character or
expression.
? Matches 0 or 1
repetitions of
the previous
character or
expression.
{n} Matches n
repetitions of
the previous
character or
expression
{n,m} Matches n to
m repetitions
of the previous
character or
expression
Cisco VCS Administrator Guide (X7.1)
Example
.* matches against any sequence of characters
9?123 matches against 9123 and 123
\d{3} matches 3 digits
\d{3,5} matches 3, 4 or 5 digits
Reference material
Page 360 of 479