- 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 one-way transformation.
- The "P3P Assurance Profile" Note explores the question of
adding semantics to signatures.