There is a more recent paper by Bill, which may be more accessible (at least, it was intended to be), called "Meaning and Links" that appeared in AI Magazine in Winter, 2007 (pp 71-92). I think some AI Mag articles are freely accessible. It is the article that encapsulates the talk Marco references, discussing the significance of the "What's in a Link" paper and how it is still relevant today.
On 9/27/2010 6:10 PM, Marco Neumann wrote:
> In March 2010 Bill Woods gave a presentation to the Cambridge Semantic
> Web meetup group to talk about his "What's in a Link" paper from 1975.
> We have recorded the session and it is now available for you online here:
> Please keep in mind that the "What's in a Link" paper predates the
> Semantic Web by roughly 25 years and is now after 35 years a
> historical record.
> Please be advised that this presentation is not directly related to
> any specific Semantic Web standards that are currently proposed by the
> W3C, it's a presentation that has a wider technology research focus in
> which Bill reviews his own contribution and evaluates it in its
> historical context.
> I personally find this to be a very valuable presentation and a story
> that needed to be told. But please keep in mind that if you are here
> to just learn something about RDF / RDFa coding for your own web
> project or to learn something about business concepts for the Semantic
> Web (make sure to attend the Semantic Web Summit if this is your main
> focus) I recommend you to save this presentation for later and to skip
> it for now.
Dr. Christopher A. Welty IBM Watson Research Center
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