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This demo represents queries on pure constraint relations that
contain data of a geometric figure---a 3D prism with dimensions x,y, and z.
The selection and projection operations on the prism may be found at
http://www.cse.uconn.edu/cdb/FigDemo2.htm. Note that the query grammar
is of the the same format to the College Database demo, and the target relation and the query
result are represented by linear algebra constraints.
Yang Fuzheng
Tue Aug 20 18:48:50 EDT 2002