<s>
Efficient	B-Language
XML	I-Language
Interchange	I-Language
(	O
EXI	O
)	O
is	O
a	O
binary	B-Protocol
XML	I-Protocol
format	O
for	O
exchange	O
of	O
data	O
on	O
a	O
computer	O
network	O
.	O
</s>
<s>
It	O
was	O
developed	O
by	O
the	O
W3C	O
's	O
Efficient	B-Language
Extensible	I-Language
Interchange	I-Language
Working	O
Group	O
and	O
is	O
one	O
of	O
the	O
most	O
prominent	O
efforts	O
to	O
encode	O
XML	B-Protocol
documents	I-Protocol
in	O
a	O
binary	O
data	O
format	O
,	O
rather	O
than	O
plain	O
text	O
.	O
</s>
<s>
Using	O
EXI	O
format	O
reduces	O
the	O
verbosity	O
of	O
XML	B-Protocol
documents	I-Protocol
as	O
well	O
as	O
the	O
cost	O
of	O
parsing	O
.	O
</s>
<s>
EXI	O
was	O
chosen	O
as	O
W3C	O
's	O
Binary	B-Protocol
XML	I-Protocol
format	O
after	O
an	O
evaluation	O
of	O
various	O
proposals	O
that	O
included	O
Fast	B-Protocol
Infoset	I-Protocol
.	O
</s>
<s>
The	O
EXI	O
format	O
is	O
derived	O
from	O
the	O
AgileDelta	O
Efficient	O
XML	B-Protocol
format	O
.	O
</s>
<s>
In	O
November	O
2016	O
,	O
the	O
working	O
group	O
was	O
renamed	O
to	O
"	O
Efficient	B-Language
Extensible	I-Language
Interchange	I-Language
(	O
EXI	O
)	O
"	O
from	O
"	O
Efficient	B-Language
XML	I-Language
Interchange	I-Language
(	O
EXI	O
)	O
"	O
to	O
reflect	O
the	O
broader	O
scope	O
of	O
EXI	O
applicability	O
beyond	O
XML	B-Protocol
to	O
other	O
data-description	O
languages	O
.	O
</s>
<s>
An	O
advantage	O
of	O
EXI	O
over	O
Fast	B-Protocol
Infoset	I-Protocol
is	O
that	O
EXI	O
(	O
optionally	O
)	O
uses	O
more	O
constraints	O
from	O
the	O
XML	B-Language
schema	I-Language
.	O
</s>
<s>
This	O
can	O
make	O
the	O
EXI	O
data	O
more	O
compact	O
;	O
for	O
example	O
,	O
if	O
the	O
XML	B-Language
schema	I-Language
specifies	O
that	O
elements	O
named	O
'	O
bar	O
 '	O
may	O
only	O
exist	O
within	O
elements	O
named	O
'	O
foo	O
 '	O
,	O
EXI	O
can	O
assign	O
a	O
shorter	O
token	O
to	O
the	O
'	O
bar	O
 '	O
element	O
,	O
knowing	O
that	O
it	O
does	O
n't	O
have	O
to	O
share	O
the	O
same	O
token	O
space	O
as	O
elements	O
that	O
occur	O
elsewhere	O
in	O
the	O
document	O
.	O
</s>
<s>
Related	O
:	O
EXI	O
is	O
being	O
adapted	O
for	O
non-XML	O
data	O
formats	O
as	O
well	O
.	O
</s>
<s>
EXI4JSON	B-Language
is	O
a	O
specification	O
developed	O
by	O
the	O
same	O
working	O
group	O
to	O
use	O
the	O
same	O
format	O
for	O
JSON	B-General_Concept
documents	O
.	O
</s>
<s>
Considering	O
potential	O
composition	O
of	O
XML	B-Protocol
EXI	O
with	O
XML	B-Protocol
Encryption	O
and	O
XML	B-Protocol
Digital	O
Signature	O
.	O
</s>
