Moving from Paths to Sets

Multidirectional Links While simple links do a great job of moving users from one place to another, they require links all over the place - the 'back' button is the most sophisticated navigation tool most browsers provide.
Sophisticated Modeling 'Linking' may be used metaphorically, as well as to describe hypertext connections. By providing a framework for describing sets, extended links permit more powerful modeling.
Fewer links, more connections Authors can write fewer actual links while representing more paths. Because extended links can represent multiple connections between resources, the number of possible connections grows at n² rather than n, where n is the number of nodes.
Memory Browsers need to remember links from previous pages (or reload them constantly) for genuinely multi-directional links to work.