<s>
Service	B-Application
Data	I-Application
Objects	I-Application
is	O
a	O
technology	O
that	O
allows	O
heterogeneous	O
data	O
to	O
be	O
accessed	O
in	O
a	O
uniform	O
way	O
.	O
</s>
<s>
The	O
SDO	O
specification	O
was	O
originally	O
developed	O
in	O
2004	O
as	O
a	O
joint	O
collaboration	O
between	O
Oracle	B-Application
(	O
BEA	O
)	O
and	O
IBM	O
and	O
approved	O
by	O
the	O
Java	B-Language
Community	I-Language
Process	I-Language
in	O
.	O
</s>
<s>
Originally	O
,	O
the	O
technology	O
was	O
known	O
as	O
Web	O
Data	O
Objects	O
,	O
or	O
WDO	O
,	O
and	O
was	O
shipped	O
in	O
IBM	B-Language
WebSphere	I-Language
Application	I-Language
Server	I-Language
5.1	O
and	O
IBM	O
WebSphere	O
Studio	O
Application	O
Developer	O
5.1.2	O
.	O
</s>
<s>
Other	O
similar	O
technologies	O
are	O
JDO	B-Language
,	O
EMF	B-Language
,	O
JAXB	B-Language
and	O
ADO.NET	B-Device
.	O
</s>
<s>
Service	B-Application
Data	I-Application
Objects	I-Application
denote	O
the	O
use	O
of	O
language-agnostic	B-Language
data	O
structures	O
that	O
facilitate	O
communication	O
between	O
structural	O
tiers	O
and	O
various	O
service-providing	O
entities	O
.	O
</s>
<s>
They	O
require	O
the	O
use	O
of	O
a	O
tree	B-Data_Structure
structure	I-Data_Structure
with	O
a	O
root	B-Application
node	I-Application
and	O
provide	O
traversal	O
mechanisms	O
(	O
breadth/depth	O
-first	O
)	O
that	O
allow	O
client	O
programs	O
to	O
navigate	O
the	O
elements	O
.	O
</s>
<s>
The	O
specification	O
is	O
now	O
being	O
developed	O
by	O
IBM	O
,	O
Rogue	O
Wave	O
,	O
Oracle	B-Application
,	O
SAP	B-Application
,	O
Siebel	O
,	O
Sybase	B-Application
,	O
Xcalia	O
,	O
Software	O
AG	O
within	O
the	O
OASIS	O
Member	O
Section	O
Open	O
CSA	O
since	O
April	O
2007	O
.	O
</s>
