 For example my latest info is that one portion
&gt; of the US Department of Defense has a data model
&gt; that cannot be viewed in a single diagram, and the
&gt; multiple perspectives take several walls to display in
&gt; a readable form.  They have over 10,000 data definitions.

Good example.  And do you suppose that "Chinese Embassy in Belgrade"
is borne somehow somewhere in this Mother of the Ten Thousand Names"?

What does it matter if you can't fold the map?
What good is it if nobody asks for directio