Table 2. Distribution of the surveyed knowledge-based works by task and by methodology.

Task	Methodology
	CBR	Ontologies	Probabilistic Models	Rules	Semantic Networks	Temporal Reasoning	Total
Behavior tracking / activity scheduling						65	1
Classification				83			1
Diagnosis		62	60, 70	64, 73, 74, 78-80, 82,84,85	77		13
CIG	71	67, 69		67, 72			4
Problem action pattern					76		1
Therapy	61	61, 62	63, 81	66, 75			6
Training		68		68			1
Total	2	5	4	15	2	1	–