<s>
A	O
recursive	B-Application
transition	I-Application
network	I-Application
(	O
"	O
RTN	O
"	O
)	O
is	O
a	O
graph	O
theoretical	O
schematic	B-Application
used	O
to	O
represent	O
the	O
rules	O
of	O
a	O
context-free	O
grammar	O
.	O
</s>
<s>
RTNs	O
have	O
application	O
to	O
programming	O
languages	O
,	O
natural	O
language	O
and	O
lexical	B-Application
analysis	I-Application
.	O
</s>
