<s>
xdelta	B-Application
is	O
a	O
command	O
line	O
program	O
for	O
delta	B-Algorithm
encoding	I-Algorithm
,	O
which	O
generates	O
the	O
difference	O
between	O
two	O
files	O
.	O
</s>
<s>
This	O
is	O
similar	O
to	O
diff	B-Application
and	O
patch	B-Application
,	O
but	O
it	O
is	O
targeted	O
for	O
binary	O
files	O
and	O
does	O
not	O
generate	O
human	O
readable	O
output	O
.	O
</s>
<s>
The	O
developer	O
of	O
xdelta	B-Application
is	O
Joshua	O
MacDonald	O
,	O
who	O
currently	O
maintains	O
the	O
program	O
.	O
</s>
<s>
The	O
algorithm	O
of	O
xdelta1	O
was	O
based	O
on	O
the	O
algorithm	O
of	O
rsync	B-Application
,	O
developed	O
by	O
Andrew	O
Tridgell	O
,	O
though	O
it	O
uses	O
a	O
smaller	O
block	O
size	O
.	O
</s>
<s>
xdelta3	O
can	O
generate	O
standardized	O
VCDIFF	B-Application
format	O
,	O
and	O
it	O
realized	O
the	O
compatibility	O
among	O
other	O
delta	B-Algorithm
encoding	I-Algorithm
software	O
which	O
supports	O
the	O
VCDIFF	B-Application
format	O
.	O
</s>
<s>
It	O
runs	O
on	O
Unix-like	B-Operating_System
operating	I-Operating_System
systems	I-Operating_System
and	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
xdelta	B-Application
can	O
handle	O
up	O
to	O
264	O
byte	O
files	O
,	O
and	O
it	O
is	O
suitable	O
for	O
large	O
backups	O
.	O
</s>
