<s>
In	O
automata	B-Application
theory	I-Application
,	O
the	O
thread	B-Application
automaton	I-Application
(	O
plural	O
:	O
automata	O
)	O
is	O
an	O
extended	O
type	O
of	O
finite-state	B-Architecture
automata	I-Architecture
that	O
recognizes	O
a	O
mildly	O
context-sensitive	O
language	O
class	O
above	O
the	O
tree-adjoining	O
languages	O
.	O
</s>
<s>
a	O
start	B-Architecture
state	I-Architecture
AS	O
∈	O
N	O
,	O
</s>
<s>
A	O
thread	B-Application
automaton	I-Application
configuration	O
is	O
a	O
triple	O
‹l	O
,	O
p	O
,	O
S›	O
,	O
where	O
l	O
denotes	O
the	O
current	O
position	O
in	O
the	O
input	O
string	O
,	O
p	O
is	O
the	O
active	O
thread	O
,	O
and	O
S	O
is	O
a	O
thread	O
store	O
containing	O
p	O
.	O
</s>
