[Zope] (no subject)

hello friends, can u please tell me where can i find information about the zope converters. this symbol " : " here are some example, <input type="submit" name="fireEmployees:action" value="Fire!"> <input type="text" name="people.lname:records"></p> i want to know the various possible use of these converters. i couldn't find detail information in the zope documentation. thanks, Sanket.