<s>
External	B-Protocol
Data	I-Protocol
Representation	I-Protocol
(	O
XDR	O
)	O
is	O
a	O
standard	O
data	B-Application
serialization	I-Application
format	O
,	O
for	O
uses	O
such	O
as	O
computer	B-Architecture
network	I-Architecture
protocols	O
.	O
</s>
<s>
XDR	O
is	O
implemented	O
as	O
a	O
software	O
library	O
of	O
functions	O
which	O
is	O
portable	O
between	O
different	O
operating	B-General_Concept
systems	I-General_Concept
and	O
is	O
also	O
independent	O
of	O
the	O
transport	B-Architecture
layer	I-Architecture
.	O
</s>
<s>
Variable-length	O
types	O
such	O
as	O
string	O
and	O
opaque	B-General_Concept
are	O
padded	O
to	O
a	O
total	O
divisible	O
by	O
four	O
bytes	O
.	O
</s>
<s>
Floating-point	B-Algorithm
numbers	I-Algorithm
are	O
represented	O
in	O
IEEE	O
754	O
format	O
.	O
</s>
