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Description
Now only LOCAL declaration has multiple form.
It should look like for example:
f,g,h = GROUP SUM a(x), b(x), c(x) BY d(x);
f,g,h = DATA INTEGER, INTEGER, STRING[50] (X);
f,g,h(x) <- a(x), b(x), c(x) WHERE w(x)
However there are really a lot of white spots in this mechanism to think about.