My January post @All Analytics.
"Logical refers to the relationships among the components of the
relation, not to any arrangement of the components of a relation. Any
presentation that preserves those relationships and adds no extra ones
is acceptable. An R-table is one possible such presentation. The problem
is that people fixate on this one presentation, identifying it with
relation. They then go even further and force the physical
implementation of a relation to be table-like." -- David McGoveran
Read it all. (Please comment there, not here)
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