<s>
In	O
computing	O
,	O
Resource	B-General_Concept
Directory	I-General_Concept
Description	I-General_Concept
Language	I-General_Concept
(	O
RDDL	B-General_Concept
)	O
is	O
an	O
extension	O
of	O
XHTML	B-Language
Basic	O
1.0	O
.	O
</s>
<s>
An	O
RDDL	B-General_Concept
document	O
,	O
called	O
a	O
Resource	B-General_Concept
Directory	I-General_Concept
,	O
provides	O
a	O
package	O
of	O
information	O
about	O
some	O
target	O
.	O
</s>
<s>
The	O
targets	O
which	O
RDDL	B-General_Concept
was	O
designed	O
to	O
describe	O
are	O
XML	B-Language
namespaces	I-Language
.	O
</s>
<s>
The	O
specification	O
for	O
RDDL	B-General_Concept
has	O
no	O
official	O
standing	O
and	O
has	O
not	O
been	O
considered	O
nor	O
approved	O
by	O
any	O
organization	O
(	O
e.g.	O
,	O
W3C	O
)	O
.	O
</s>
<s>
RDDL	B-General_Concept
is	O
designed	O
to	O
allow	O
both	O
human	O
readers	O
and	O
software	O
robots	O
to	O
find	O
any	O
sort	O
of	O
resource	O
associated	O
with	O
a	O
particular	O
namespace	O
.	O
</s>
<s>
Instead	O
of	O
putting	O
one	O
thing	O
at	O
the	O
end	O
of	O
a	O
namespace	O
URI	B-Protocol
,	O
RDDL	B-General_Concept
puts	O
a	O
document	O
there	O
that	O
lists	O
all	O
the	O
machine-processable	O
documents	O
that	O
might	O
be	O
available	O
,	O
including	O
:	O
</s>
<s>
An	O
RDDL	B-General_Concept
document	O
identifies	O
each	O
related	O
resource	O
by	O
a	O
resource	O
element	O
in	O
the	O
namespace	O
,	O
which	O
is	O
customarily	O
mapped	O
to	O
the	O
rddl	B-General_Concept
prefix	O
.	O
</s>
