XML Infoset Specification: http://www.w3.org/TR/xml-infoset
Canonical XML Specification: http://www.w3.org/TR/xml-c14n
XML Signature Specification: http://www.w3.org/TR/xmldsig-core/
XML Encryption Requirements: http://www.w3.org/TR/xml-encryption-req
XML Encryption Syntax and Processing: http://www.w3.org/TR/xmlenc-core/