<s>
In	O
automata	B-Application
theory	I-Application
,	O
an	O
alternating	B-Application
tree	I-Application
automaton	I-Application
(	O
ATA	O
)	O
is	O
an	O
extension	O
of	O
nondeterministic	B-Application
tree	I-Application
automaton	I-Application
as	O
same	O
as	O
alternating	B-General_Concept
finite	I-General_Concept
automaton	I-General_Concept
extends	O
nondeterministic	B-General_Concept
finite	I-General_Concept
automaton	I-General_Concept
(	O
NFA	O
)	O
.	O
</s>
