13.3. The RetrievalMethod Element
The RetrievalMethod element appears as a child of KeyInfo. It conveys a reference to KeyInfo information that is stored at another location. For example, several signatures in a document might use a key supported by an X.509v3 certificate chain. With RetrievalMethod, that chain need appear only once in the document or remotely outside the document, and each signature's KeyInfo can then reference it. Use of RetrievalMethod is recommended for XMLDSIG implementations and, for same document retrievals only, required for XML Encryption implementations.
 | The RetrievalMethod element is not an algorithm element, as are ... |
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