The Java Agent uses Java libraries for regular expressions. See:

• Tutorial: http://download.oracle.com/javase/tutorial/essential/regex/index.html
• Javadoc: http://download.oracle.com/javase/1.5.0/docs/api/java/util/regex/Pattern.html

The .NET Agent uses the built in .NET regular expressions engine. See:

• MSDN: .NET Framework Regular Expressions

The Node.js Agent uses JavaScript regular expressions. See:

• https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp

The PHP Agent uses PHP's built-in PCRE regular expression engine and requires the same syntax, including delimiters (for example: /^Foo/). See:

• PCRE Manual

The Python Agent uses Python's regular expression syntax. See:

• https://docs.python.org/2/library/re.html

The Web Server Agent uses Perl regular expression syntax. See:

• http://www.boost.org/doc/libs/1_57_0/libs/regex/doc/html/boost_regex/syntax/perl_syntax.html