| ActivationDataFlavor | The ActivationDataFlavor class is similar to the JDK's
 java.awt.datatransfer.DataFlavorclass. | 
| CommandInfo | The CommandInfo class is used by CommandMap implementations to
 describe the results of command requests. | 
| CommandMap | The CommandMap class provides an interface to a registry of
 command objects available in the system. | 
| DataContentHandler | The DataContentHandler interface is implemented by objects that can
 be used to extend the capabilities of the DataHandler's implementation
 of the Transferable interface. | 
| DataContentHandlerFactory | This interface defines a factory for DataContentHandlers. | 
| DataHandler | The DataHandler class provides a consistent interface to data
 available in many different sources and formats. | 
| DataSource | The DataSource interface provides Jakarta Activation
 with an abstraction of an arbitrary collection of data. | 
| FileTypeMap | The FileTypeMap is an abstract class that provides a data typing
 interface for files. | 
| MimeType | A Multipurpose Internet Mail Extension (MIME) type, as defined
 in RFC 2045 and 2046. | 
| MimeTypeEntry | Represents mapping between the file extension and the MIME type string. | 
| MimeTypeParameterList | A parameter list of a MimeType
 as defined in RFC 2045 and 2046. | 
| MimeTypeParseException | A class to encapsulate MimeType parsing related exceptions. |