<s>
The	O
Web	B-Language
Application	I-Language
Description	I-Language
Language	I-Language
(	O
WADL	O
)	O
is	O
a	O
machine-readable	O
XML	B-Protocol
description	O
of	O
HTTP-based	O
web	O
services	O
.	O
</s>
<s>
WADL	O
is	O
intended	O
to	O
simplify	O
the	O
reuse	O
of	O
web	O
services	O
that	O
are	O
based	O
on	O
the	O
existing	O
HTTP	B-Protocol
architecture	O
of	O
the	O
Web	O
.	O
</s>
<s>
WADL	O
is	O
the	O
REST	O
equivalent	O
of	O
SOAP	B-Application
's	O
Web	O
Services	O
Description	O
Language	O
(	O
WSDL	O
)	O
,	O
which	O
can	O
also	O
be	O
used	O
to	O
describe	O
REST	O
web	O
services	O
.	O
</s>
<s>
The	O
request	O
element	O
specifies	O
how	O
to	O
represent	O
the	O
input	O
,	O
what	O
types	O
are	O
required	O
and	O
any	O
specific	O
HTTP	B-Protocol
headers	O
that	O
are	O
required	O
.	O
</s>
