<s>
XOVER	B-Protocol
is	O
a	O
Network	B-Protocol
News	I-Protocol
Transfer	I-Protocol
Protocol	I-Protocol
(	O
NNTP	B-Protocol
)	O
command	O
used	O
to	O
return	O
information	O
from	O
a	O
news	B-Application
server	I-Application
's	O
overview	O
(	O
NOV	B-Application
)	O
database	O
.	O
</s>
<s>
The	O
XOVER	B-Protocol
command	O
is	O
documented	O
in	O
RFC	O
2980	O
,	O
a	O
specification	O
for	O
Common	O
NNTP	B-Protocol
Extensions	O
authored	O
by	O
Stan	O
O	O
.	O
Barber	O
in	O
October	O
2000	O
.	O
</s>
<s>
A	O
newer	O
version	O
of	O
NNTP	B-Protocol
,	O
specified	O
in	O
RFC	O
3977	O
,	O
formalized	O
the	O
XOVER	B-Protocol
extension	O
with	O
new	O
OVER	O
and	O
LIST	O
OVERVIEW.FMT	O
commands	O
.	O
</s>
