Pattern
Synopsis
Compiles a regular expression.
String conversion
Parses the value as a regular expression in Java Regular Expression Format (see Java regexp ).
XML conversion
<param value="PATTERN"/>
or
<param pattern="PATTERN"/>
or
<param regexp="PATTERN"/>
or
<param regex="PATTERN"/>
or
<param>PATTERN</param>
PATTERN is converted into a regular expression pattern as specified by the string conversion.