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Index1 ...
•ZPL comes with “constant arrays” of any size
•Indexi means indices of the ith dimension
–[1..n,1..n]  begin
–               Z := Index1; -- fill with first index
–               P := Index2; -- fill with second index
–               L := Z=P;    -- define identity array
–             end;
•These array -- of arbitrary dimension -- are compiler created using no space
•