<s>
In	O
computer	B-General_Concept
science	I-General_Concept
,	O
constrained	B-Algorithm
clustering	I-Algorithm
is	O
a	O
class	O
of	O
semi-supervised	B-General_Concept
learning	I-General_Concept
algorithms	O
.	O
</s>
<s>
Typically	O
,	O
constrained	B-Algorithm
clustering	I-Algorithm
incorporates	O
either	O
a	O
set	O
of	O
must-link	B-Algorithm
constraints	O
,	O
cannot-link	O
constraints	O
,	O
or	O
both	O
,	O
with	O
a	O
data	B-Algorithm
clustering	I-Algorithm
algorithm	O
.	O
</s>
<s>
A	O
cluster	O
in	O
which	O
the	O
members	O
conform	O
to	O
all	O
must-link	B-Algorithm
and	O
cannot-link	O
constraints	O
is	O
called	O
a	O
chunklet	B-Algorithm
.	O
</s>
<s>
Both	O
a	O
must-link	B-Algorithm
and	O
a	O
cannot-link	O
constraint	O
define	O
a	O
relationship	O
between	O
two	O
data	O
instances	O
.	O
</s>
<s>
Together	O
,	O
the	O
sets	O
of	O
these	O
constraints	O
act	O
as	O
a	O
guide	O
for	O
which	O
a	O
constrained	B-Algorithm
clustering	I-Algorithm
algorithm	O
will	O
attempt	O
to	O
find	O
chunklets	B-Algorithm
(	O
clusters	O
in	O
the	O
dataset	O
which	O
satisfy	O
the	O
specified	O
constraints	O
)	O
.	O
</s>
<s>
A	O
must-link	B-Algorithm
constraint	O
is	O
used	O
to	O
specify	O
that	O
the	O
two	O
instances	O
in	O
the	O
must-link	B-Algorithm
relation	O
should	O
be	O
associated	O
with	O
the	O
same	O
cluster	O
.	O
</s>
<s>
Some	O
constrained	B-Algorithm
clustering	I-Algorithm
algorithms	O
will	O
abort	O
if	O
no	O
such	O
clustering	O
exists	O
which	O
satisfies	O
the	O
specified	O
constraints	O
.	O
</s>
<s>
Examples	O
of	O
constrained	B-Algorithm
clustering	I-Algorithm
algorithms	O
include	O
:	O
</s>
