x schrieb:
> You say a relation is flat because the attributes of a single tuple are all
> at the same "level" like (a1,a2,...,an) in R(A1,A2,A3,...,An) instead of
> something like (((a1,a2), (a3,a4)), a5, (a6,a7,a8),....) so the tuples are
> flat, not the relations.
Not precisely, but your interpretation is very close to what I tried to
say and I think quite compatible (concerning tuples). But actually I do
not insist on my interpretation of the term "flat". I simply describe
what I find natural. The idea is very simple. If we have a set with
elements then I tend to consider it flat because I do not see anything
behind these elements and over this set. A single relation is precisely
such a set without more specific and more general levels (if you
consider only one relation - not many).
--
http://conceptoriented.com
Received on Thu Feb 23 2006 - 08:02:44 CST
