Zend_Server family of classes provides functionality
for the various server classes, including
Zend_Server_Interface provides an interface that mimics PHP
SoapServer class; all server classes should implement
this interface in order to provide a standard server API.
Zend_Server_Reflection tree provides a standard
mechanism for performing function and class introspection for use as
callbacks with the server classes, and provides data suitable for use
and loadFunctions() methods.