From: John Fox
Dear Gregory, Paul, and Jan,
I recall proposing something like this (that is, a classification of
available functions) some time ago, but it never got off the
ground. The
advantage of using keywords is that package authors would
classify their
own functions, but I don't think that the current set of keywords is
adequate. It would be particularly useful to work out a
hierarchical or
perhaps hyper-linked classification (without restricting particular
functions to just one terminal node).