Collaborative articulation of how abstraction and language is employed in the computational manifestation of numbers -- including analysis of the role of syntax, semantics, and meaning in the specification and use of software interfaces.
2004: Metadata for the desktop. This Edd Dumbill article provides worked examples and demonstration of the value of metadata (via RDF) on the desktop. It is rather interesting that it is automatically presumed that RDF expresses semantics, with little demonstration of how that occurs, except for some hand-waving around the use of <dc:creator>.
From 2004-07-04: This was in the backlog of drafts. There are more-recent topics concerning where the semantics are to be found in Dublin Core and other entity tag sets in XML and especially RDF. This is going to be part of the development around What Computers Know as the progression is expanded.