<s>
Graphite	B-Application
is	O
a	O
programmable	O
Unicode-compliant	O
smart	O
font	O
technology	O
and	O
rendering	O
system	O
developed	O
by	O
SIL	O
International	O
as	O
free	B-Application
software	I-Application
,	O
distributed	O
under	O
the	O
terms	O
of	O
the	O
GNU	B-Application
Lesser	I-Application
General	I-Application
Public	I-Application
License	I-Application
and	O
the	O
Common	O
Public	O
License	O
.	O
</s>
<s>
Graphite	B-Application
is	O
based	O
on	O
the	O
TrueType	O
font	O
format	O
,	O
and	O
adds	O
three	O
of	O
its	O
own	O
tables	O
.	O
</s>
<s>
It	O
allows	O
for	O
a	O
variety	O
of	O
rendering	O
rules	O
,	O
including	O
ligatures	O
,	O
glyph	B-Application
substitution	O
,	O
glyph	B-Application
insertion	O
,	O
glyph	B-Application
rearrangement	O
,	O
anchoring	O
diacritics	O
,	O
kerning	O
,	O
and	O
justification	O
.	O
</s>
<s>
Graphite	B-Application
rules	O
may	O
be	O
sensitive	O
to	O
the	O
context	O
.	O
</s>
<s>
For	O
instance	O
,	O
there	O
might	O
be	O
a	O
glyph	B-Application
substitution	O
rule	O
that	O
replaces	O
every	O
non-final	O
s	B-Language
by	O
an	O
ſ	O
.	O
</s>
<s>
In	O
a	O
Graphite	B-Application
font	O
,	O
all	O
smart	O
rendering	O
information	O
resides	O
within	O
the	O
font	O
file	O
.	O
</s>
<s>
In	O
order	O
to	O
display	O
the	O
Graphite	B-Application
smart	O
rendering	O
,	O
an	O
application	O
needs	O
only	O
Graphite	B-Application
support	O
,	O
but	O
no	O
built-in	O
knowledge	O
about	O
the	O
writing	O
system	O
’s	O
rendering	O
.	O
</s>
<s>
This	O
makes	O
Graphite	B-Application
especially	O
suited	O
for	O
minority	O
writing	O
systems	O
that	O
cannot	O
rely	O
on	O
applications	O
to	O
provide	O
built-in	O
rendering	O
information	O
.	O
</s>
<s>
In	O
this	O
regard	O
,	O
Graphite	B-Application
is	O
similar	O
to	O
AAT	O
and	O
different	O
from	O
OpenType	O
which	O
requires	O
applications	O
to	O
provide	O
built-in	O
rendering	O
information	O
.	O
</s>
<s>
Graphite	B-Application
was	O
originally	O
implemented	O
on	O
Windows	B-Application
.	O
</s>
<s>
It	O
has	O
been	O
ported	O
to	O
Linux	B-Application
.	O
</s>
<s>
It	O
is	O
also	O
available	O
on	O
Mac	B-Device
OS	I-Device
X	I-Device
Snow	I-Device
Leopard	I-Device
although	O
with	O
AAT	O
,	O
macOS	O
already	O
provides	O
a	O
technology	O
suitable	O
for	O
minority	O
scripts	O
.	O
</s>
<s>
Applications	O
that	O
support	O
Graphite	B-Application
include	O
the	O
SIL	O
WorldPad	O
,	O
XeTeX	B-Application
,	O
OpenOffice.org	B-Application
(	O
since	O
version	O
3.2	O
,	O
except	O
for	O
the	O
macOS	O
version	O
)	O
,	O
LibreOffice	B-Application
(	O
formerly	O
except	O
for	O
the	O
macOS	O
version	O
,	O
since	O
version	O
5.3	O
,	O
Graphite	B-Application
is	O
available	O
on	O
all	O
platforms	O
)	O
.	O
</s>
<s>
It	O
was	O
built	O
into	O
Thunderbird	B-Application
11	O
and	O
Firefox	B-Application
11	O
,	O
and	O
was	O
turned	O
on	O
by	O
default	O
since	O
version	O
22	O
,	O
but	O
was	O
disabled	O
in	O
Firefox	B-Application
version	O
45.0.1	O
and	O
re-enabled	O
in	O
version	O
49.0	O
.	O
</s>
<s>
Graphite	B-Application
support	O
can	O
be	O
added	O
to	O
applications	O
on	O
Linux	B-Application
with	O
the	O
package	O
pango-graphite	O
and	O
on	O
Windows	B-Application
with	O
the	O
experimental	O
add-on	O
MultiScribe	O
.	O
</s>
