<s>
Morphological	B-General_Concept
parsing	I-General_Concept
,	O
in	O
natural	B-Language
language	I-Language
processing	I-Language
,	O
is	O
the	O
process	O
of	O
determining	O
the	O
morphemes	O
from	O
which	O
a	O
given	O
word	O
is	O
constructed	O
.	O
</s>
<s>
It	O
must	O
be	O
able	O
to	O
distinguish	O
between	O
orthographic	O
rules	O
and	O
morphological	B-General_Concept
rules	I-General_Concept
.	O
</s>
<s>
The	O
generally	O
accepted	O
approach	O
to	O
morphological	B-General_Concept
parsing	I-General_Concept
is	O
through	O
the	O
use	O
of	O
a	O
finite	B-Architecture
state	I-Architecture
transducer	I-Architecture
(	O
FST	O
)	O
,	O
which	O
inputs	O
words	O
and	O
outputs	O
their	O
stem	O
and	O
modifiers	O
.	O
</s>
<s>
Another	O
approach	O
is	O
through	O
the	O
use	O
of	O
an	O
indexed	O
lookup	O
method	O
,	O
which	O
uses	O
a	O
constructed	O
radix	B-Data_Structure
tree	I-Data_Structure
.	O
</s>
<s>
With	O
the	O
advancement	O
of	O
neural	B-Architecture
networks	I-Architecture
in	O
natural	B-Language
language	I-Language
processing	I-Language
,	O
it	O
became	O
less	O
common	O
to	O
use	O
FST	O
for	O
morphological	O
analysis	O
,	O
especially	O
for	O
languages	O
for	O
which	O
there	O
is	O
a	O
lot	O
of	O
available	O
training	O
data	O
.	O
</s>
<s>
For	O
such	O
languages	O
,	O
it	O
is	O
possible	O
to	O
build	O
character-level	O
language	B-Language
models	I-Language
without	O
explicit	O
use	O
of	O
a	O
morphological	O
parser	O
.	O
</s>
<s>
Contrast	O
this	O
to	O
morphological	B-General_Concept
rules	I-General_Concept
which	O
contain	O
corner	O
cases	O
to	O
these	O
general	O
rules	O
.	O
</s>
<s>
Both	O
of	O
these	O
types	O
of	O
rules	O
are	O
used	O
to	O
construct	O
systems	O
that	O
can	O
do	O
morphological	B-General_Concept
parsing	I-General_Concept
.	O
</s>
<s>
Morphological	B-General_Concept
rules	I-General_Concept
are	O
exceptions	O
to	O
the	O
orthographic	O
rules	O
used	O
when	O
breaking	O
a	O
word	O
into	O
its	O
stem	O
and	O
modifiers	O
.	O
</s>
<s>
Both	O
of	O
these	O
types	O
of	O
rules	O
are	O
used	O
to	O
construct	O
systems	O
that	O
can	O
do	O
morphological	B-General_Concept
parsing	I-General_Concept
.	O
</s>
