Every document can have secure access controls. Every document can be rapidly searched, stored and retrieved without user knowledge of where it is physically stored. Every document is automatically moved to physical storage appropriate to its frequency of access from any given location. Every document is automatically stored redundantly to maintain availability even in case of a disaster. Every Xanadu service provider can charge their users at any rate they choose for the storage, retrieval and publishing of documents.
Every transaction is secure and auditable only by the parties to that transaction.
The Xanadu client-server communication protocol is an openly published standard. Third-party software development and integration is encouraged. The forthcoming HTML 4.0 will additionally support requirement 2f. 3c Microcosm has also been influenced by the Xanadu ideas and supports requirements 2d, 2g and 2j. Ted Nelson thought up the whole thing in 1960, and has been speaking and publishing about the idea since 1965.