-*- outline -*-
 For the future
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*Stylesheets
Use CSS-like selectors to apply styles to nodes.

*Reflection
Can even do this with tinyclos -- supers and slots and all that.  We'd
have the pretend all there was was CLOS classes, with the equivalents
for all the ground types.  Also, no manipulation (or is there .. ?).
Good for a browser anyway.
What about closures (blocks)?  Can we reify them as objects?

*Zowiki
A zooming wiki .. hoo hoo!  How does layout work?  Could work
semantically (in fact, would be a good test of the semantic reasoning
-> layout idea).

*RDF model
Have a single tuple database, and construct the view from the
top-down.  This supports the spatial-relation -> semantic-relation
concept.

*Rules and guides
TonyG suggests rulers and tear-off guides a la painting programs.
This could be useful for giving an absolute sense of location.