<s>
Hyperlinks	O
are	O
,	O
at	O
present	O
,	O
a	O
novel	O
feature	O
in	O
virtual	B-Application
world	I-Application
platforms	O
,	O
aside	O
from	O
hyperlinks	O
in	O
the	O
in-built	O
chat	O
clients	O
between	O
users	O
 '	O
avatars	O
.	O
</s>
<s>
In	O
the	O
latter	O
2000s	O
,	O
however	O
,	O
a	O
number	O
of	O
architectures	O
were	O
created	O
for	O
various	O
decentralized	B-Operating_System
virtual	B-Application
world	I-Application
platforms	O
in	O
order	O
to	O
facilitate	O
easier	O
travel	O
of	O
avatars	O
between	O
two	O
or	O
more	O
separately-hosted	O
grids	O
or	O
servers	O
.	O
</s>
<s>
Open	B-Protocol
Cobalt	I-Protocol
uses	O
a	O
method	O
of	O
hyperlinking	O
,	O
known	O
as	O
"	O
space-linking	O
"	O
,	O
which	O
resembles	O
a	O
window	O
frame	O
or	O
portal	O
and	O
,	O
when	O
revolved	O
,	O
shows	O
a	O
360-degree	O
real-time	O
view	O
of	O
one	O
region	O
to	O
a	O
user	O
in	O
another	O
region	O
;	O
such	O
portals	O
can	O
also	O
be	O
walked	O
through	O
by	O
users	O
.	O
</s>
<s>
Like	O
MediaWiki	B-Application
's	O
redlinks	O
,	O
such	O
portals	O
are	O
also	O
used	O
to	O
link	O
to	O
uncreated	O
spaces	O
or	O
regions	O
(	O
colored	O
in	O
black	O
)	O
in	O
order	O
to	O
indicate	O
the	O
need	O
to	O
create	O
newer	O
spaces	O
.	O
</s>
<s>
OpenSimulator	B-Protocol
also	O
uses	O
an	O
architecture	O
known	O
as	O
""	O
,	O
which	O
allows	O
users	O
to	O
teleport	O
between	O
multiple	O
OpenSim-based	O
virtual	B-Application
worlds	I-Application
by	O
providing	O
a	O
hyperlinked	O
map	O
which	O
indexes	O
public	O
grids	O
.	O
</s>
