The city is something like
an ecosystem, with its webwork. This, in turn, could be viewed as a metaphor
for hypertext. This site is as hypertext, is as a metaphor for the city.
People within the city interact
on numerous levels -- a
hierarchy of city life -- just as my web works on various different levels.
Within the webwork, there are roads and highways, streets
and networks of subway systems. Trains run through the web, and wherever
can always pick a different way to go.