I have just watched a pretty nifty presentation (courtesy of
Babelfish)
about the 10
dimensions of our existence (a 'la String Theory)
when it dawned on me that similar thinking can be applied to the
Web :-)
Dimension 1 = Interactive Web (Visual
Web of HTML based Sites aka Web 1.0)
Dimension 2 = Services Web (Presence
based Web of Services; a usage pattern commonly referred to as Web
2.0)
Dimension 3 = Data Web (Presence and
Open Data Access based Web of Databases aka Semantic Web layer
1)
Dimension 4 = Ontology Web
(Intelligent Agent palatable Web aka Semantic Web layer 2)
....
Hopefully, I can expand further :-)