Table 2 Knowledge representation: main types of concepts
From: Fine-grained information extraction from German transthoracic echocardiography reports
Concept type | Description | Examples |
|---|---|---|
Structure | organization of entries; no meaning for information extraction | measurements, assessment |
Object | anchor for ambiguous attributes; definition of a complex frame | aortic valve, mitral valve |
Object attribute | type of information with ambiguous meaning; it requires an object context | regurgitation (aortic) |
Attribute | unambiguous type of information stated in reports | LVEF, E/E’ |
Value | specific state of an attribute | present, absent, severe |