<s>
languages	O
used	O
to	O
transform	O
and	O
render	O
XML	B-Protocol
documents	I-Protocol
.	O
</s>
<s>
Historically	O
,	O
the	O
W3C	O
XSL	B-Language
Working	O
Group	O
produced	O
a	O
draft	O
specification	O
under	O
the	O
name	O
"	O
XSL	B-Language
"	O
,	O
which	O
eventually	O
split	O
into	O
three	O
parts	O
:	O
</s>
<s>
XML	B-Language
Path	I-Language
Language	I-Language
(	O
XPath	B-Language
)	O
:	O
a	O
non-XML	O
language	O
used	O
by	O
XSLT	B-Application
,	O
and	O
also	O
available	O
for	O
use	O
in	O
non-XSLT	O
contexts	O
,	O
for	O
addressing	O
the	O
parts	O
of	O
an	O
XML	B-Protocol
document	I-Protocol
.	O
</s>
<s>
As	O
a	O
result	O
,	O
the	O
term	O
"	O
XSL	B-Language
"	O
is	O
now	O
used	O
with	O
a	O
number	O
of	O
different	O
meanings	O
:	O
</s>
<s>
Sometimes	O
it	O
refers	O
to	O
XSLT	B-Application
:	O
this	O
usage	O
is	O
best	O
avoided	O
.	O
</s>
<s>
This	O
article	O
is	O
concerned	O
with	O
the	O
various	O
usages	O
of	O
the	O
term	O
"	O
XSL	B-Language
"	O
:	O
for	O
details	O
of	O
the	O
various	O
languages	O
embraced	O
by	O
the	O
term	O
,	O
see	O
the	O
relevant	O
article	O
.	O
</s>
<s>
XSL	B-Language
began	O
as	O
an	O
attempt	O
to	O
bring	O
the	O
functionality	O
of	O
DSSSL	B-Language
,	O
particularly	O
in	O
the	O
area	O
of	O
print	O
and	O
high-end	O
typesetting	O
,	O
to	O
XML	B-Protocol
.	O
</s>
<s>
In	O
response	O
to	O
a	O
submission	O
from	O
Arbortext	O
,	O
Inso	O
,	O
and	O
Microsoft	O
,	O
a	O
W3C	O
working	O
group	O
on	O
XSL	B-Language
started	O
operating	O
in	O
December	O
1997	O
,	O
with	O
Sharon	O
Adler	O
and	O
Steve	O
Zilles	O
as	O
co-chairs	O
,	O
with	O
James	O
Clark	O
acting	O
as	O
editor	O
(	O
and	O
unofficially	O
as	O
chief	O
designer	O
)	O
,	O
and	O
Chris	O
Lilley	O
as	O
the	O
W3C	O
staff	O
contact	O
.	O
</s>
<s>
XSLT	B-Application
and	O
XPath	B-Language
became	O
W3C	O
Recommendations	O
on	O
16	O
November	O
1999	O
and	O
XSL-FO	B-Language
reached	O
Recommendation	O
status	O
on	O
15	O
October	O
2001	O
.	O
</s>
<s>
The	O
original	O
version	O
of	O
XSLT	B-Application
(	O
1.0	O
)	O
was	O
published	O
in	O
November	O
1999	O
,	O
and	O
was	O
widely	O
implemented	O
.	O
</s>
<s>
actively	O
used	O
in	O
2023	O
include	O
those	O
integrated	O
into	O
the	O
mainstream	O
web	B-Application
browsers	I-Application
,	O
as	O
well	O
as	O
Altova	O
's	O
RaptorXML	O
,	O
libxslt	B-Language
,	O
Saxon	B-Language
,	O
the	O
Microsoft	O
.NET	B-Application
implementation	O
System.Xml.Xsl	O
,	O
and	O
Xalan	B-Language
which	O
is	O
integrated	O
into	O
the	O
Oracle	O
JVM	B-Language
.	O
</s>
<s>
Subsequent	O
versions	O
of	O
XSLT	B-Application
include	O
XSLT	B-Application
2.0	I-Application
(	O
January	O
2007	O
)	O
and	O
XSLT	B-Application
3.0	O
(	O
June	O
2017	O
)	O
;	O
there	O
is	O
work	O
in	O
progress	O
on	O
a	O
version	O
4.0	O
.	O
</s>
<s>
These	O
versions	O
have	O
not	O
been	O
as	O
widely	O
implemented	O
as	O
1.0	O
:	O
the	O
main	O
implementations	O
in	O
widespread	O
use	O
in	O
2023	O
are	O
Saxon	B-Language
(	O
available	O
in	O
various	O
versions	O
for	O
different	O
platforms	O
,	O
including	O
web	B-Application
browsers	I-Application
)	O
,	O
and	O
Altova	O
's	O
RaptorXML	O
.	O
</s>
<s>
Support	O
for	O
XSL	B-Language
Formatting	I-Language
Objects	I-Language
is	O
available	O
in	O
a	O
number	O
of	O
products	O
:	O
</s>
<s>
XML	B-Language
Path	I-Language
Language	I-Language
(	O
XPath	B-Language
)	O
,	O
itself	O
part	O
of	O
the	O
XSL	B-Language
family	O
,	O
functions	O
within	O
XSLT	B-Application
as	O
a	O
means	O
of	O
navigating	O
an	O
XML	B-Protocol
document	I-Protocol
.	O
</s>
<s>
Another	O
W3C	O
project	O
,	O
XQuery	B-Language
,	O
aims	O
to	O
provide	O
similar	O
capabilities	O
for	O
querying	O
XML	B-Protocol
documents	I-Protocol
using	O
XPath	B-Language
.	O
</s>
