<s>
Sequitur	O
(	O
or	O
Nevill-Manning	B-Algorithm
algorithm	I-Algorithm
)	O
is	O
a	O
recursive	O
algorithm	O
developed	O
by	O
Craig	O
Nevill-Manning	O
and	O
Ian	O
H	O
.	O
Witten	O
in	O
1997	O
that	O
infers	O
a	O
hierarchical	O
structure	O
(	O
context-free	O
grammar	O
)	O
from	O
a	O
sequence	O
of	O
discrete	O
symbols	O
.	O
</s>
<s>
It	O
can	O
be	O
used	O
in	O
data	B-General_Concept
compression	I-General_Concept
software	O
applications	O
.	O
</s>
<s>
The	O
sequitur	B-Algorithm
algorithm	I-Algorithm
constructs	O
a	O
grammar	O
by	O
substituting	O
repeating	O
phrases	O
in	O
the	O
given	O
sequence	O
with	O
new	O
rules	O
and	O
therefore	O
produces	O
a	O
concise	O
representation	O
of	O
the	O
sequence	O
.	O
</s>
