1. Each row represents a k-tuple of R
2. The values of an attribute are all from the same domain
3. Each attribute of each tuple in a relation contains a single atomic value
4. The ordering of rows is immaterial (relations are just sets)
5. All rows are distinct (relations are just sets)
6. Named perspective: the semantics of each column is conveyed its name
7. Named perspective: the ordering of the attributes is not significant
8. Unnamed perspective: the ordering of attributes is significant (we access columns by their
positions)
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