Table 2 Triple-structure of the subject, predicate, and object in the concept layer

1

Entity (Basic information)

select

Attributes (Name, Sex, etc.)

2

Entity (Report)

has_a

Entity (Basic information, Mammography information,

BI-RADS information)

3

Entity (Mammography information)

instance_of

First-level entity (Common signs, Merge signs, etc.)

4

First-level entity (Common signs, Merge signs, etc.)

part_of

Second-level entity (Mass, Calcification, Structure, etc.)

5

Second-level entity (Structure, Mass, etc.)

select

Attributes (Location, Size, etc.)