Table 1 Unification of terms in popular models
Unifying term | Relational | Array | Graph | RDF | Key/Value | Document | Column |
|---|---|---|---|---|---|---|---|
Kind | Table | Matrix | Label | Set of triples | Bucket | Collection | Column family |
Record | Tuple | Cell | Node/edge | Triple | Pair (key, value) | Document | Row |
Property | Attribute | Attribute | Property | Predicate | Value | JSON Field/XML element or attribute | Column |
Domain | Data type | Data type | Data type | IRI/iteral/blank node | – | Data type | Data type |
Value | Value | Value | Value | Object | Value | Value | Value |
Identifier | Key | Coordinates/dimensions | Identifier | Subject | Key | JSON identifier/XML ID or key | Row key |
Reference | Foreign key | – | – | – | – | JSON reference/XML keyref | – |
Array | – | – | Array | – | Array | JSON array/repeating XML elements | Array |
Structure | – | – | – | – | Set/ZSet / Hash | Nested document | Super column |