What are RDF and XML and how do they relate to P3P?
XML stands for the Extensible Markup Langauge. XML is a language for encoding information in a format that is easy to transfer across the World Wide Web. Web sites that use P3P encode their privacy policies in an XML format. RDF stands for Resource Description Framework. RDF is an application of XML that is used for encoding metadata. Previous versions of the P3P specification used RDF to encode privacy policy information; however, the current version of the P3P specification does not.