Ontology-Based Framework for the Automatic Recognition of Activities of Daily Living Using Class Expression Learning Techniques

Algorithm 1

CEL algorithm.

Require: is the set of named concepts in the knowledge base. n is the maximum number of class description the algorithm generates in the search process. α is a constant float value that indicates the importance of negative samples classification accuracy.
(1)	function CEL
(2)	while do
(3)	b ⟵ BEST-DESCRIPTION ()
(4)
(5)	for all do
(6)
(7)	if then
(8)
(9)
(10)	return b
(11)	function BEST-DESCRIPTION ()
(12)
(13)
(14)	for all do
(15)
(16)
(17)	if then
(18)
(19)
(20)	return c