<s>
The	O
Astrophysical	B-Application
Virtual	I-Application
Observatory	I-Application
(	O
AVO	O
)	O
project	O
conducted	O
a	O
research	O
and	O
demonstration	O
programme	O
on	O
the	O
scientific	O
requirements	O
and	O
technologies	O
necessary	O
to	O
build	O
a	O
virtual	B-Application
observatory	I-Application
for	O
European	O
astronomy	O
.	O
</s>
