<s>
In	O
computing	O
,	O
Open	B-Application
Data	I-Application
Protocol	I-Application
(	O
OData	B-Application
)	O
is	O
an	O
open	O
protocol	O
that	O
allows	O
the	O
creation	O
and	O
consumption	O
of	O
queryable	O
and	O
interoperable	O
REST	O
APIs	B-General_Concept
in	O
a	O
simple	O
and	O
standard	O
way	O
.	O
</s>
<s>
Microsoft	O
initiated	O
OData	B-Application
in	O
2007	O
.	O
</s>
<s>
In	O
April	O
2015	O
OASIS	O
submitted	O
OData	B-Application
v4	O
and	O
OData	B-Application
JSON	B-General_Concept
Format	O
v4	O
to	O
ISO/IEC	O
JTC	O
1	O
for	O
approval	O
as	O
an	O
international	O
standard	O
.	O
</s>
<s>
In	O
December	O
2016	O
,	O
ISO/IEC	O
published	O
OData	B-Application
4.0	O
Core	O
as	O
ISO/IEC	O
20802-1:2016	O
and	O
the	O
OData	B-Application
JSON	B-General_Concept
Format	O
as	O
ISO/IEC	O
20802-2:2016	O
.	O
</s>
<s>
The	O
protocol	O
enables	O
the	O
creation	O
and	O
consumption	O
of	O
REST	O
APIs	B-General_Concept
,	O
which	O
allow	O
Web	O
clients	O
to	O
publish	O
and	O
edit	O
resources	O
,	O
identified	O
using	O
URLs	O
and	O
defined	O
in	O
a	O
data	B-Application
model	I-Application
,	O
using	O
simple	O
HTTP	B-Protocol
messages	O
.	O
</s>
<s>
OData	B-Application
shares	O
some	O
similarities	O
with	O
JDBC	B-Language
and	O
with	O
ODBC	B-Application
;	O
like	O
ODBC	B-Application
,	O
OData	B-Application
is	O
not	O
limited	O
to	O
relational	B-Application
databases	I-Application
.	O
</s>
<s>
After	O
initial	O
development	O
by	O
Microsoft	O
,	O
OData	B-Application
became	O
a	O
standardized	O
protocol	O
of	O
the	O
OASIS	O
OData	B-Application
Technical	O
Committee	O
(	O
TC	O
)	O
.	O
</s>
<s>
"	O
The	O
OASIS	O
OData	B-Application
TC	O
works	O
to	O
simplify	O
the	O
querying	O
and	O
sharing	O
of	O
data	O
across	O
disparate	O
applications	O
and	O
multiple	O
stakeholders	O
for	O
re-use	O
in	O
the	O
enterprise	O
,	O
Cloud	O
,	O
and	O
mobile	O
devices	O
.	O
</s>
<s>
A	O
REST-based	O
protocol	O
,	O
OData	B-Application
builds	O
on	O
HTTP	B-Protocol
,	O
AtomPub	B-Application
,	O
and	O
JSON	B-General_Concept
using	O
URIs	B-Protocol
to	O
address	O
and	O
access	O
data	O
feed	O
resources	O
.	O
</s>
<s>
It	O
enables	O
information	O
to	O
be	O
accessed	O
from	O
a	O
variety	O
of	O
sources	O
including	O
(	O
but	O
not	O
limited	O
to	O
)	O
relational	B-Application
databases	I-Application
,	O
file	O
systems	O
,	O
content	O
management	O
systems	O
,	O
and	O
traditional	O
Web	O
sites	O
.	O
</s>
<s>
OData	B-Application
provides	O
a	O
way	O
to	O
break	O
down	O
data	O
silos	O
and	O
increase	O
the	O
shared	O
value	O
of	O
data	O
by	O
creating	O
an	O
ecosystem	O
in	O
which	O
data	O
consumers	O
can	O
interoperate	O
with	O
data	O
producers	O
in	O
a	O
way	O
that	O
is	O
far	O
more	O
powerful	O
than	O
currently	O
possible	O
,	O
enabling	O
more	O
applications	O
to	O
make	O
sense	O
of	O
a	O
broader	O
set	O
of	O
data	O
.	O
</s>
<s>
TC	O
participants	O
include	O
CA	O
Technologies	O
,	O
Citrix	B-Application
Systems	I-Application
,	O
IBM	O
,	O
Microsoft	O
,	O
Progress	O
Software	O
,	O
Red	O
Hat	O
,	O
SAP	B-Application
SE	I-Application
and	O
SDL	O
.	O
</s>
<s>
OData	B-Application
is	O
a	O
protocol	O
for	O
the	O
creation	O
and	O
consumption	O
of	O
RESTful	O
APIs	B-General_Concept
.	O
</s>
<s>
Thus	O
,	O
as	O
common	O
practices	O
of	O
REST	O
,	O
OData	B-Application
builds	O
on	O
HTTP	B-Protocol
,	O
AtomPub	B-Application
,	O
and	O
JSON	B-General_Concept
using	O
URIs	B-Protocol
to	O
address	O
and	O
access	O
data	O
feed	O
resources	O
.	O
</s>
<s>
OData	B-Application
uses	O
URIs	B-Protocol
to	O
identify	O
resources	O
.	O
</s>
<s>
For	O
every	O
OData	B-Application
service	O
whose	O
service	O
root	O
is	O
abbreviated	O
as	O
http://host/service/	O
,	O
the	O
following	O
fixed	O
resources	O
can	O
be	O
found	O
:	O
</s>
<s>
The	O
metadata	O
document	O
describes	O
the	O
types	O
,	O
sets	O
,	O
functions	O
and	O
actions	O
understood	O
by	O
the	O
OData	B-Application
service	O
.	O
</s>
<s>
The	O
URIs	B-Protocol
for	O
the	O
dynamic	O
resources	O
may	O
be	O
computed	O
from	O
the	O
hypermedia	O
information	O
in	O
the	O
service	O
document	O
and	O
metadata	O
document	O
.	O
</s>
<s>
OData	B-Application
uses	O
the	O
HTTP	B-Protocol
verbs	O
to	O
indicate	O
the	O
operations	O
on	O
the	O
resources	O
.	O
</s>
<s>
URLs	O
requested	O
from	O
an	O
OData	B-Application
endpoint	O
may	O
include	O
query	O
options	O
.	O
</s>
<s>
The	O
OData	B-Application
protocol	O
specifies	O
various	O
'	O
system	O
query	O
options	O
 '	O
endpoints	O
should	O
accept	O
,	O
these	O
can	O
be	O
used	O
to	O
filter	O
,	O
order	O
,	O
map	O
or	O
paginate	O
data	O
.	O
</s>
<s>
character	O
and	O
are	O
separated	O
by	O
&	O
characters	O
;	O
each	O
option	O
consists	O
of	O
a	O
$	O
-sign	O
prefixed	O
name	O
and	O
its	O
value	O
,	O
separated	O
by	O
a	O
=	O
sign	O
,	O
for	O
example	O
:	O
OData/Products	O
?	O
$top	O
=	O
2&$orderby	O
=	O
Name	O
.	O
</s>
<s>
A	O
number	O
of	O
logical	O
operators	O
and	O
functions	O
are	O
defined	O
for	O
use	O
when	O
filtering	O
data	O
,	O
for	O
example	O
:	O
OData/Products	O
?	O
$filter	O
=	O
Price	O
lt	O
10.00	O
and	O
startswith(Name,'M' )	O
requests	O
products	O
with	O
a	O
price	O
smaller	O
than	O
10	O
and	O
a	O
name	O
starting	O
with	O
the	O
letter	O
'	O
M	O
 '	O
.	O
</s>
<s>
OData	B-Application
uses	O
different	O
formats	O
for	O
representing	O
data	O
and	O
the	O
data	B-Application
model	I-Application
.	O
</s>
<s>
In	O
OData	B-Application
protocol	O
version	O
4.0	O
,	O
JSON	B-General_Concept
format	O
is	O
the	O
standard	O
for	O
representing	O
data	O
,	O
with	O
the	O
Atom	B-Application
format	O
still	O
being	O
in	O
committee	O
specification	O
stage	O
.	O
</s>
<s>
For	O
representing	O
the	O
data	B-Application
model	I-Application
,	O
the	O
Common	O
Schema	O
Definition	O
Language	O
(	O
CSDL	O
)	O
is	O
used	O
,	O
which	O
defines	O
an	O
XML	O
representation	O
of	O
the	O
entity	O
data	B-Application
model	I-Application
exposed	O
by	O
OData	B-Application
services	O
.	O
</s>
<s>
The	O
ecosystem	O
of	O
OData	B-Application
consists	O
of	O
the	O
client/server	O
libraries	O
that	O
implement	O
the	O
protocol	O
,	O
and	O
applications	O
that	O
are	O
based	O
on	O
the	O
protocol	O
.	O
</s>
<s>
There	O
are	O
a	O
number	O
of	O
OData	B-Application
libraries	O
available	O
to	O
access/produce	O
OData	B-Application
APIs	B-General_Concept
:	O
</s>
<s>
Client	O
:	O
JayData	O
for	O
higher	O
level	O
of	O
abstraction	O
(	O
LINQ-like	O
syntax	O
,	O
support	O
for	O
OData	B-Application
geo	O
features	O
,	O
IndexedDB	O
,	O
WebSQL	O
,	O
integration	O
for	O
DevExtreme	O
,	O
Kendo	O
UI	O
,	O
Angular.js	O
,	O
Knockout.js	O
and	O
Sencha	O
)	O
.	O
</s>
<s>
AJAX	O
:	O
ASP.NET	O
Ajax	O
Library	O
for	O
getting	O
to	O
OData	B-Application
.	O
</s>
<s>
C++	O
:	O
odatacpp_client	O
is	O
a	O
client-side-only	O
implementation	O
of	O
the	O
OData	B-Application
protocol	O
.	O
</s>
<s>
Windward	O
Studios	O
supports	O
OData	B-Application
in	O
their	O
Reporting	O
&	O
Document	O
Generation	O
Solutions	O
.	O
</s>
<s>
Reporting	O
tool	O
List	B-Application
&	I-Application
Label	I-Application
has	O
a	O
specialized	O
data	O
provider	O
for	O
OData	B-Application
.	O
</s>
<s>
Socrata	O
exposes	O
an	O
OData	B-Application
API	B-General_Concept
.	O
</s>
<s>
Microsoft	B-Application
Azure	I-Application
exposes	O
an	O
OData	B-Application
API	B-General_Concept
.	O
</s>
<s>
SAP	B-Application
NetWeaver	I-Application
Gateway	O
provides	O
OData	B-Application
access	O
to	O
SAP	B-Application
Business	O
Suite	O
and	O
SAP	B-Application
Business	O
Warehouse	O
.	O
</s>
<s>
IBM	O
WebSphere	O
eXtreme	O
Scale	O
REST	O
data	O
service	O
can	O
be	O
accessed	O
by	O
any	O
HTTP	B-Protocol
client	O
using	O
OData	B-Application
.	O
</s>
<s>
Office	B-Operating_System
365	I-Operating_System
exposes	O
OData	B-Application
V4.0	O
APIs	B-General_Concept
.	O
</s>
<s>
Salesforce	B-Application
Connect	O
consumes	O
OData	B-Application
APIs	B-General_Concept
.	O
</s>
<s>
Tableau	O
can	O
connect	O
to	O
OData	B-Application
APIs	B-General_Concept
.	O
</s>
<s>
TIBCO	O
Spotfire	O
can	O
connect	O
to	O
OData	B-Application
APIs	B-General_Concept
.	O
</s>
<s>
Mulesoft	O
helps	O
integrate	O
with	O
OData	B-Application
APIs	B-General_Concept
.	O
</s>
