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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