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502 | Reference ClearPass Guest 3.9 | Deployment Guide
The regular expression syntax used is Perl-compatible. For further details on writing regular expressions,
consult a tutorial or programming manual.
Table 65 Regular Expressions for Pattern Matching
Regex Matches
a Any string containing the letter “a”
^a Any string starting with “a”
^a$ Only the string “a”
a$ Any string ending with “a”
. Any single character
\. A literal “.”
[abc] Any of the characters a, b, or c
[a-z0-9A-Z] Any alphanumeric character
[^a-z] Any character not in the set a through z
a? Matches zero or one “a”
a+ Matches one or more: a, aa, aaa,
a* Matches zero or more: empty string, a, aa, aaa…
a|b Alternate matches: Matches an “a” or “b”
(a.*z) Grouping: matches sequentially within parentheses
a*? “Non-greedy” zero or more matches
\ooo The character with octal code ooo
\040 A space
\d Any decimal digit
\D Any character that is not a decimal digit
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