. Author manuscript; available in PMC: 2016 May 1.

Published in final edited form as: Artif Intell Med. 2015 Apr 2;64(1):1–16. doi: 10.1016/j.artmed.2015.03.005

Table 1.

Example abstraction networks and their characteristics

Name	Underlying terminology	Disjoint	Intrinsic/extrinsic	Abstraction ratio
MED schema	MED	✓	intrinsic	478:1
InterMed schema	InterMed	✓	intrinsic	89:1
Semantic Network (SN)	UMLS		extrinsic	19500:1
Refined SN	UMLS	✓	intrinsic	5400:1
Area taxonomy	SNOMED	✓	intrinsic	58:1
Partial-area taxonomy	SNOMED		intrinsic	3.26:1
Disjoint partial-area taxonomy	SNOMED	✓	intrinsic	2.73:1