The basic structure of a StringScriptingRule is very similar to the structure of a HttpParsingRule. It also consists of two sections named Search and ScriptGen (see example below).
<StringScriptingRule> <Name>Replace TimeStamp</Name> <Active>true</Active> <Search> <SearchIn>FormFieldValue</SearchIn> <LB> <Offset>0</Offset> </LB> <RB> <Length>0</Length> </RB> </Search> <ScriptGen> <Action>CheckTimeStamp</Action> </ScriptGen> </StringScriptingRule>