Entity:
A 28 62
null  *  source
x int 3 false false false

Entity:
B 255 88
B0  * source
y double 3 false false false

Entity:
C 402 212
null  * source
z String 3 false false false

Association:
A B 0 113 70 257 116 1 br null 


Association:
B C 0 371 119 481 217 1 cr null 


Entity:
B0 286 14
null  * abstract source
p boolean 3 false false false

Generalisation:
B0 B 330 92 325 51



Entity:
D 579 94
null  * target 
a int 3 false false false b boolean 3 false false false c double 3 false false false d String 3 false false false