Chapter37 Cisco Common Classification Policy Language
Parameter Maps
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Cisco Router and Security Device Manager 2.5 User’s Guide
OL-4015-12
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Zero or one times (?)—A quantifier that indicates that there are 0 or 1 of
the previous expression. For example, lo?se matches lse or lose.
–
One or more times (+)—A quantifier that indicates that there is at least 1
of the previous expression. For example, lo+se matches lose and loose,
but not lse.
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One or more times (+)—A quantifier that indicates that there is at least 1
of the previous expression. For example, lo+se matches lose and loose,
but not lse.
–
Any number of times (*)—A quantifier that indicates that there are 0, 1
or any number of the previous expression. For example, lo*se matches
lse, lose, loose, etc.
–
At least—Repeat at least x times. For example, ab(xy){2,}z matches
abxyxyz, abxyxyxyz, etc.
–
Exactly—Repeat exactly x times. For example, ab(xy){3}z matches
abxyxyxyz.
•Apply to Selection—Applies the quantifier to the selection.
Regular Expression Metacharacters
The following table lists the metacharacters that have special meanings.
Character Description Notes
.Dot Matches any single character. For example, d.g matches
dog, dag, dtg, and any word that contains those
characters, such as doggonnit.
(exp)Subexpression A subexpression segregates characters from surrounding
characters, so that you can use other metacharacters on
the subexpression. For example, d(o|a)g matches dog
and dag, but do|ag matches do and ag. A subexpression
can also be used with repeat quantifiers to differentiate
the characters meant for repetition. For example,
ab(xy){3}z matches abxyxyxyz.
|Alternation Matches either expression it separates. For example,
dog|cat matches dog or cat.