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Table 7 The NS and the total number of semantics for each database

From: A novel approach for learning ontology from relational database: from the construction to the evaluation

  North E-commerce Sakila Northwind
NTDFK 5 12 5 4
NTFK 10 6 10 3
NTMTWOFK 8 7 6 3
NTEXTWOFK 7 4 7 3
NAFKNNU 15 10 7 5
NAFKNNNU 10 7 7 4
NAFKNNU 0 0 6 0
DefVal 0 0 3 0
NANNUNPK 0 0 2 0
NA 50 23 24 42
NAN 30 25 8 15
NANFKU 15 10 10 4
NPK 30 25 18 16
NACHECK 0 0 5 0
NADef 0 0 3 3
NTSAMEPK 0 0 2 0
NUnaryRel 0 0 2 0
NTrRel 0 0 1 0
Number of semantics (NS) 10 10 17 13
Total number of semantics 180 129 126 102
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