<s>
The	O
Semantic	B-Language
Web	I-Language
Rule	I-Language
Language	I-Language
(	O
SWRL	O
)	O
is	O
a	O
proposed	O
language	O
for	O
the	O
Semantic	O
Web	O
that	O
can	O
be	O
used	O
to	O
express	O
rules	O
as	O
well	O
as	O
logic	O
,	O
combining	O
OWL	B-Language
DL	I-Language
or	O
OWL	B-Language
Lite	O
with	O
a	O
subset	O
of	O
the	O
Rule	B-Language
Markup	I-Language
Language	I-Language
(	O
itself	O
a	O
subset	O
of	O
Datalog	B-Language
)	O
.	O
</s>
<s>
The	O
specification	O
was	O
based	O
on	O
an	O
earlier	O
proposal	O
for	O
an	O
OWL	B-Language
rules	O
language	O
.	O
</s>
<s>
SWRL	O
has	O
the	O
full	O
power	O
of	O
OWL	B-Language
DL	I-Language
,	O
but	O
at	O
the	O
price	O
of	O
decidability	O
and	O
practical	O
implementations	O
.	O
</s>
<s>
The	O
XML	B-Protocol
Concrete	O
Syntax	O
is	O
a	O
combination	O
of	O
the	O
OWL	B-Language
Web	B-Language
Ontology	I-Language
Language	I-Language
XML	B-Protocol
Presentation	O
Syntax	O
with	O
the	O
RuleML	B-Language
XML	B-Protocol
syntax	O
.	O
</s>
<s>
Translation	O
from	O
the	O
XML	B-Protocol
Concrete	O
Syntax	O
to	O
RDF/XML	O
could	O
be	O
easily	O
accomplished	O
by	O
extending	O
the	O
XSLT	B-Application
transformation	O
for	O
the	O
OWL	B-Language
XML	B-Protocol
Presentation	O
syntax	O
.	O
</s>
<s>
expand	O
an	O
existing	O
OWL-DL	O
reasoner	O
based	O
on	O
the	O
tableaux	O
algorithm	O
(	O
Pellet	B-Language
)	O
.	O
</s>
<s>
Protégé	B-Language
4.2	O
includes	O
a	O
Rules	O
view	O
in	O
its	O
Ontology	O
Views	O
that	O
supports	O
SWRL	O
rules	O
.	O
</s>
<s>
For	O
older	O
versions	O
of	O
Protégé	B-Language
,	O
SWRLTab	O
is	O
an	O
extension	O
that	O
supports	O
editing	O
and	O
execution	O
of	O
SWRL	O
rules	O
.	O
</s>
<s>
R2ML	B-Language
(	O
REWERSE	O
Rule	B-Language
Markup	I-Language
Language	I-Language
)	O
supports	O
SWRL	O
.	O
</s>
<s>
Hoolet	O
,	O
an	O
implementation	O
of	O
an	O
OWL-DL	O
reasoner	O
that	O
uses	O
a	O
first	O
order	O
prover	O
supports	O
SWRL	O
.	O
</s>
<s>
Pellet	B-Language
,	O
an	O
open-source	O
Java	O
OWL	B-Language
DL	I-Language
reasoner	O
has	O
SWRL-support	O
.	O
</s>
<s>
KAON2	O
is	O
an	O
infrastructure	O
for	O
managing	O
OWL-DL	O
,	O
SWRL	O
,	O
and	O
F-Logic	O
ontologies	O
.	O
</s>
<s>
Description	B-Language
Logic	I-Language
Programs	O
(	O
DLPs	O
)	O
are	O
another	O
proposal	O
for	O
integrating	O
rules	O
and	O
OWL	B-Language
.	O
</s>
<s>
Compared	O
with	O
Description	B-Language
Logic	I-Language
Programs	O
,	O
SWRL	O
takes	O
a	O
diametrically	O
opposed	O
integration	O
approach	O
.	O
</s>
<s>
DLP	O
is	O
the	O
intersection	O
of	O
Horn	B-Application
logic	I-Application
and	O
OWL	B-Language
,	O
whereas	O
SWRL	O
is	O
(	O
roughly	O
)	O
the	O
union	O
of	O
them	O
.	O
</s>
<s>
In	O
DLP	O
,	O
the	O
resultant	O
language	O
is	O
a	O
very	O
peculiar	O
looking	O
description	B-Language
logic	I-Language
and	O
rather	O
inexpressive	O
language	O
overall	O
.	O
</s>
