| Interface | Description | 
|---|---|
| AlgorithmMethod | An abstract representation of an algorithm defined in the XML Security
 specifications. | 
| Data | An abstract representation of the result of dereferencing a
  URIReferenceor the input/output of subsequentTransforms. | 
| KeySelectorResult | The result returned by the  KeySelector.selectmethod. | 
| NodeSetData | An abstract representation of a  Datatype containing a
 node-set. | 
| URIDereferencer | A dereferencer of  URIReferences. | 
| URIReference | Identifies a data object via a URI-Reference, as specified by
 RFC 2396. | 
| XMLCryptoContext | Contains common context information for XML cryptographic operations. | 
| XMLStructure | A representation of an XML structure from any namespace. | 
| Class | Description | 
|---|---|
| KeySelector | A selector that finds and returns a key using the data contained in a
  KeyInfoobject. | 
| KeySelector.Purpose | The purpose of the key that is to be selected. | 
| OctetStreamData | A representation of a  Datatype containing an octet stream. | 
| Exception | Description | 
|---|---|
| KeySelectorException | Indicates an exceptional condition thrown by a  KeySelector. | 
| MarshalException | Indicates an exceptional condition that occurred during the XML
 marshalling or unmarshalling process. | 
| NoSuchMechanismException | This exception is thrown when a particular XML mechanism is requested but
 is not available in the environment. | 
| URIReferenceException | Indicates an exceptional condition thrown while dereferencing a
  URIReference. | 
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