Zend Framework ships with a concrete implementation of
Zend_Loader_Autoloader_Resource that contains resource
type mappings that cover the default recommended directory structure
for Zend Framework MVC applications. This loader,
Zend_Application_Module_Autoloader, comes with the
forms/ => Form models/ => Model DbTable/ => Model_DbTable mappers/ => Model_Mapper plugins/ => Plugin services/ => Service views/ helpers => View_Helper filters => View_Filter
As an example, if you have a module with the prefix of "Blog_", and attempted to instantiate the class "Blog_Form_Entry", it would look in the resource directory's "forms/" subdirectory for a file named "Entry.php".
When using module bootstraps with
Zend_Application_Module_Autoloader will be
created by default for each discrete module, allowing you to
autoload module resources.