In the Policy Editor NetScope allows you to match by http domains (such as microsoft.com). However, you may also use Regular Expressions to expand the match so that, for example, you can match all subdomains of microsoft.com. Below is a list of allowed matching expressions.

MChar 
Definition 
^ 
Start of a string. 
$ 
End of a string. 
. 
Any character (except \n newline) 
 
Alternation. 
{…} 
Explicit quantifier notation. 
[…] 
Explicit set of characters to match. 
(…) 
Logical grouping of part of an expression. 
* 
0 or more of previous expression. 
+ 
1 or more of previous expression. 
? 
0 or 1 of previous expression; also forces minimal matching when an expression might match several strings within a search string. 
\ 
Preceding one of the above, it makes it a literal instead of a special character. Preceding a special matching character, see below. 


Pattern 
Sample Matches 
^abc 
abc, abcdefg, abc123, … 
abc$ 
abc, endsinabc, 123abc, … 
a.c 
abc, aac, acc, adc, aec, … 
billted 
ted, bill 
ab{2}c 
abbc 
a[bB]c 
abc, aBc 
(abc){2} 
abcabc 
ab*c 
ac, abc, abbc, abbbc, … 
ab+c 
abc, abbc, abbbc, … 
ab?c 
ac, abc 
a\sc 
a c 

Character Classes

Char Class 
Description 
. 
Matches any character except \n. If modified by the Singleline option, a period character matches any character. For more information, see Regular Expression Options. 
[aeiou] 
Matches any single character included in the specified set of characters. 
[^aeiou] 
Matches any single character not in the specified set of characters. 
[09afAF] 
Use of a hyphen (–) allows specification of contiguous character ranges. 
\p{name} 
Matches any character in the named character class specified by {name}. Supported names are Unicode groups and block ranges. For example, Ll, Nd, Z, IsGreek, IsBoxDrawing. 
\P{name} 
Matches text not included in groups and block ranges specified in {name}. 
\w 
Matches any word character. Equivalent to the Unicode character categories
[\p{Ll}\p{Lu}\p{Lt}\p{Lo}\p{Nd}\p{Pc}]. If ECMAScriptcompliant behavior is specified with the ECMAScript option, \w is equivalent to [azAZ_09]. 
\W 
Matches any nonword character. Equivalent to the Unicode categories [^\p{Ll}\p{Lu}\p{Lt}\p{Lo}\p{Nd}\p{Pc}]. If ECMAScriptcompliant behavior is specified with the ECMAScript option, \W is equivalent to [^azAZ_09]. 
\s 
Matches any whitespace character. Equivalent to the Unicode character categories [\f\n\r\t\v\x85\p{Z}]. If ECMAScriptcompliant behavior is specified with the ECMAScript option, \s is equivalent to [ \f\n\r\t\v]. 
\S 
Matches any nonwhitespace character. Equivalent to the Unicode character categories [^\f\n\r\t\v\x85\p{Z}]. If ECMAScriptcompliant behavior is specified with the ECMAScript option, \S is equivalent to [^ \f\n\r\t\v]. 
\d 
Matches any decimal digit. Equivalent to \p{Nd} for Unicode and [09] for nonUnicode, ECMAScript behavior. 
\D 
Matches any nondigit. Equivalent to \P{Nd} for Unicode and [^09] for nonUnicode, ECMAScript behavior. 