<s>
RESTful	B-Application
API	I-Application
Modeling	I-Application
Language	I-Application
(	O
RAML	B-Application
)	O
is	O
a	O
YAML-based	O
language	O
for	O
describing	O
static	O
APIs	B-General_Concept
(	O
but	O
not	O
REST	B-Protocol
APIs	I-Protocol
)	O
.	O
</s>
<s>
It	O
provides	O
all	O
the	O
information	O
necessary	O
to	O
describe	O
APIs	B-General_Concept
on	O
the	O
level	O
2	O
of	O
the	O
Richardson	O
Maturity	O
Model	O
.	O
</s>
<s>
Although	O
designed	O
with	O
RESTful	B-Protocol
APIs	I-Protocol
in	O
mind	O
,	O
RAML	B-Application
is	O
not	O
capable	O
of	O
describing	O
APIs	B-General_Concept
that	O
obey	O
all	O
constraints	O
of	O
REST	O
(	O
it	O
cannot	O
describe	O
an	O
API	B-General_Concept
obeying	O
HATEOAS	B-Operating_System
,	O
in	O
particular	O
)	O
.	O
</s>
<s>
RAML	B-Application
was	O
first	O
proposed	O
in	O
2013	O
.	O
</s>
<s>
The	O
initial	O
RAML	B-Application
specification	O
was	O
authored	O
by	O
Uri	O
Sarid	O
,	O
Emiliano	O
Lesende	O
,	O
Santiago	O
Vacas	O
and	O
Damian	O
Martinez	O
,	O
and	O
garnered	O
support	O
from	O
technology	O
leaders	O
like	O
MuleSoft	B-General_Concept
,	O
AngularJS	B-Application
,	O
Intuit	O
,	O
Box	O
,	O
PayPal	O
,	O
Programmable	B-Application
Web	I-Application
and	O
API	B-General_Concept
Web	O
Science	O
,	O
Kin	O
Lane	O
,	O
SOA	O
Software	O
,	O
and	O
Cisco	O
.	O
</s>
<s>
Development	O
is	O
managed	O
by	O
the	O
RAML	B-Application
Workgroup	O
.	O
</s>
<s>
The	O
current	O
workgroup	O
signatories	O
include	O
technology	O
leaders	O
from	O
MuleSoft	B-General_Concept
(	O
Uri	O
Sarid	O
,	O
CTO	O
)	O
,	O
AngularJS	B-Application
(	O
Misko	O
Hevery	O
,	O
Project	O
Founder	O
)	O
,	O
Intuit	O
(	O
Ivan	O
Lazarov	O
,	O
Chief	O
Enterprise	O
Architect	O
)	O
,	O
Airware	O
(	O
Peter	O
Rexer	O
,	O
Director	O
of	O
Product	O
-	O
Developer	O
Platform	O
)	O
,	O
Programmable	B-Application
Web	I-Application
and	O
API	B-General_Concept
Science	O
(	O
John	O
Musser	O
,	O
Founder	O
)	O
,	O
SOA	O
Software	O
(	O
Tony	O
Gullotta	O
,	O
Director	O
of	O
Development	O
)	O
,	O
Cisco	O
(	O
Jaideep	O
Subedar	O
,	O
Senior	O
Manager	O
,	O
Product	O
Management	O
-	O
Application	O
Integration	O
Solutions	O
Group	O
)	O
,	O
VMware	O
(	O
Kevin	O
Duffey	O
,	O
Senior	O
MTS	O
Engineer	O
)	O
,	O
Akamai	B-Application
Technologies	I-Application
(	O
Rob	O
Daigneau	O
,	O
Director	O
of	O
Architecture	O
for	O
Akamai	B-Application
's	O
OPEN	O
API	B-General_Concept
Platform	O
)	O
and	O
Restlet	O
(	O
Jerome	O
Louvel	O
,	O
CTO	O
and	O
Founder	O
)	O
.	O
</s>
<s>
RAML	B-Application
is	O
a	O
trademark	O
of	O
MuleSoft	B-General_Concept
.	O
</s>
<s>
Very	O
few	O
existing	O
APIs	B-General_Concept
meet	O
the	O
precise	O
criteria	O
to	O
be	O
classified	O
as	O
RESTful	B-Protocol
APIs	I-Protocol
.	O
</s>
<s>
Consequently	O
,	O
like	O
most	O
API	B-General_Concept
initiatives	O
in	O
the	O
2010s	O
,	O
RAML	B-Application
has	O
initially	O
focussed	O
on	O
the	O
basics	O
of	O
APIs	B-General_Concept
including	O
resources	O
,	O
methods	O
,	O
parameters	O
,	O
and	O
response	O
bodies	O
that	O
need	O
not	O
be	O
hypermedia	O
.	O
</s>
<s>
There	O
are	O
a	O
number	O
of	O
reasons	O
why	O
RAML	B-Application
has	O
broken	O
out	O
from	O
being	O
a	O
proprietary	O
vendor	O
language	O
and	O
has	O
proven	O
interesting	O
to	O
the	O
broader	O
API	B-General_Concept
community	O
:	O
</s>
<s>
RAML	B-Application
has	O
been	O
open-sourced	O
along	O
with	O
tools	O
and	O
parsers	O
for	O
common	O
languages	O
.	O
</s>
<s>
MuleSoft	B-General_Concept
originally	O
started	O
using	O
Swagger	B-Architecture
(	O
now	O
OpenAPI	B-Architecture
Specification	I-Architecture
)	O
,	O
but	O
decided	O
it	O
was	O
best	O
suited	O
to	O
documenting	O
an	O
existing	O
API	B-General_Concept
,	O
not	O
for	O
designing	O
an	O
API	B-General_Concept
from	O
scratch	O
.	O
</s>
<s>
API	B-General_Concept
descriptions	O
are	O
often	O
verbose	O
and	O
repetitive	O
,	O
which	O
can	O
make	O
them	O
difficult	O
to	O
understand	O
and	O
use	O
,	O
and	O
slow	O
adoption	O
of	O
the	O
APIs	B-General_Concept
.	O
</s>
<s>
A	O
new	O
organization	O
,	O
under	O
the	O
sponsorship	O
of	O
the	B-Operating_System
Linux	I-Operating_System
Foundation	I-Operating_System
,	O
called	O
the	O
Open	O
API	B-General_Concept
Initiative	O
was	O
set	O
up	O
in	O
2015	O
to	O
standardize	O
the	O
description	O
of	O
HTTP	B-Protocol
APIs	B-General_Concept
.	O
</s>
<s>
A	O
number	O
of	O
companies	O
including	O
SmartBear	B-General_Concept
,	O
Google	B-Application
,	O
IBM	O
and	O
Microsoft	O
were	O
founding	O
members	O
.	O
</s>
<s>
SmartBear	B-General_Concept
donated	O
the	O
Swagger	B-Architecture
specification	O
to	O
the	O
new	O
group	O
.	O
</s>
<s>
RAML	B-Application
and	O
API	B-General_Concept
Blueprint	O
are	O
also	O
under	O
consideration	O
by	O
the	O
group	O
.	O
</s>
<s>
This	O
is	O
an	O
example	O
RAML	B-Application
file	O
.	O
</s>
<s>
As	O
with	O
YAML	B-Protocol
,	O
indentation	O
shows	O
nesting	O
.	O
</s>
<s>
line	O
25	O
,	O
36	O
:	O
MIME	B-Application
types	I-Application
.	O
</s>
<s>
Furthermore	O
,	O
you	O
can	O
convert	O
your	O
RAML	B-Application
specification	O
to	O
either	O
OpenAPI	B-Architecture
or	O
API	B-General_Concept
Blueprint	O
using	O
,	O
thus	O
enabling	O
you	O
to	O
use	O
further	O
API	B-General_Concept
gateways	O
.	O
</s>
