<s>
XPointer	B-General_Concept
is	O
a	O
system	O
for	O
addressing	O
components	O
of	O
XML-based	O
Internet	O
media	O
.	O
</s>
<s>
It	O
is	O
divided	O
among	O
four	O
specifications	O
:	O
a	O
"	O
framework	B-Architecture
"	O
that	O
forms	O
the	O
basis	O
for	O
identifying	O
XML	B-Protocol
fragments	O
,	O
a	O
positional	O
element	O
addressing	O
scheme	O
,	O
a	O
scheme	O
for	O
namespaces	O
,	O
and	O
a	O
scheme	O
for	O
XPath-based	O
addressing	O
.	O
</s>
<s>
XPointer	B-General_Concept
Framework	B-Architecture
is	O
a	O
W3C	O
recommendation	O
since	O
March	O
2003	O
.	O
</s>
<s>
The	O
XPointer	B-General_Concept
language	O
is	O
designed	O
to	O
address	O
structural	O
aspects	O
of	O
XML	B-Protocol
,	O
including	O
text	O
content	O
and	O
other	O
information	O
objects	O
created	O
as	O
a	O
result	O
of	O
parsing	B-Language
the	O
document	O
.	O
</s>
<s>
During	O
development	O
,	O
and	O
until	O
2016	O
,	O
XPointer	B-General_Concept
was	O
covered	O
by	O
a	O
royalty-free	O
technology	O
patent	O
held	O
by	O
Sun	O
Microsystems	O
.	O
</s>
<s>
This	O
is	O
similar	O
to	O
a	O
simple	O
XPath	B-Language
address	O
,	O
but	O
subsequent	O
steps	O
can	O
only	O
be	O
numbers	O
representing	O
the	O
position	O
of	O
a	O
descendant	O
relative	O
to	O
its	O
branch	O
on	O
the	O
tree	O
.	O
</s>
