- The specification must describe how to use XML syntax to represent a
signature over digital content (and XML content in particular).
- XML-signatures are generated from a hash over a list of references and
the digest value of the references' content.
- The meaning of a signature is simple: The XML-signature syntax
associates the content of resources listed with a key via a strong
- The "P3P Assurance Profile" Note explores the question of adding
semantics to signatures.