Polycom V2IU 4350 user manual Regular Expressions Symbol Description

Configuring the V2IU 4350

Regular Expressions

Alias manipulation patterns and prefixes use regular expressions to match a string in the destination alias. A regular expression can be a string of literal characters to match or a set of special expressions.

Alias manipulation patterns can match a sub-string at any location and number of times within the alias. Prefixes are always searched from the left of the alias and cannot match a middle part or the end of the alias.

Regular expressions are listed in <l_link>Table 1 and <l_link>Table 2 lists some example expressions.

Table 1 Regular Expressions

Symbol	Description
.	Matches any single character.
[]	Matches any single character listed between the []. For example,
	[abc], [123]. If the characters are separated by a -, all characters
	between the two are matching, e.g. [a-z], [0-9]
()	Matches the literal string given, e.g. (abc)
	Matches the block on either side of the , e.g. ab.

?Matches 0 or 1 of the preceding block.

*Matches 0 or more of the preceding block.

+Matches 1 or more of the preceding block.

\Escapes the special meaning of the next character.

{a}	Matches exactly 'a' numbers of the preceding block.
{a,}	Matches 'a' or more of the preceding block.
{a,b}	Matches between 'a' and 'b' (inclusive) of the preceding block.

Table 2 Example Regular Expressions

Expression Description

100Matches the string 100.

(555)?123 Matches 555123 or 123.

(408555) Matches 408 or 555.

555[0-9]{3} Matches 555 followed by exactly 3 digits.

#Matches the character '#'.

\*	Matches the character '*'. Note that '*' by itself is a regular
	expression and must therefore be escaped with a '\' to match the
	character itself.

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