| ErrorListener | 
           To provide customized error handling, implement this interface and
 use the   | 
      
| Result | 
           An object that implements this interface contains the information needed to build a transformation result tree.  | 
      
| Source | An object that implements this interface contains the information needed to act as source input (XML source or transformation instructions). | 
| SourceLocator | This interface is primarily for the purposes of reporting where an error occurred in the XML source or transformation instructions. | 
| Templates | An object that implements this interface is the runtime representation of processed transformation instructions. | 
| URIResolver | 
           An object that implements this interface that can be called by the processor to turn a URI used in document(), xsl:import, or xsl:include into a Source object.  | 
      
| OutputKeys | Provides string constants that can be used to set output properties for a Transformer, or to retrieve output properties from a Transformer or Templates object. | 
| Transformer | An instance of this abstract class can transform a source tree into a result tree. | 
| TransformerFactory | 
           A TransformerFactory instance can be used to create
   | 
      
| TransformerConfigurationException | Indicates a serious configuration error. | 
| TransformerException | This class specifies an exceptional condition that occurred during the transformation process. | 
| TransformerFactoryConfigurationError | Thrown when a problem with configuration with the Transformer Factories exists. |