<s>
Prince	O
(	O
formerly	O
Prince	B-Application
XML	I-Application
)	O
is	O
a	O
computer	O
program	O
that	O
converts	O
XML	B-Protocol
and	O
HTML	B-Language
documents	O
into	O
PDF	B-Application
files	I-Application
by	O
applying	O
Cascading	B-Language
Style	I-Language
Sheets	I-Language
(	O
CSS	B-Language
)	O
.	O
</s>
<s>
Prince	O
supports	O
all	O
common	O
web	O
standards	O
,	O
including	O
HTML	B-Language
,	O
CSS	B-Language
and	O
JavaScript	B-Language
,	O
through	O
its	O
own	O
code	O
.	O
</s>
<s>
That	O
is	O
,	O
Prince	O
is	O
not	O
based	O
on	O
a	O
browser	B-Protocol
engine	I-Protocol
,	O
but	O
implements	O
its	O
own	O
engine	O
.	O
</s>
<s>
Prince	O
can	O
generate	O
accessible	O
PDFs	B-Application
conforming	O
to	O
the	O
PDF/UA	B-Protocol
profile	I-Protocol
(	O
ISO	B-Protocol
14289	I-Protocol
,	O
the	O
International	O
Standard	O
for	O
accessible	O
PDF	B-Application
technology	O
)	O
that	O
can	O
be	O
used	O
by	O
people	O
with	O
assistive	O
technologies	O
.	O
</s>
<s>
Prince	O
is	O
developed	O
by	O
YesLogic	B-Application
,	O
a	O
small	O
company	O
based	O
in	O
Melbourne	O
,	O
Australia	O
.	O
</s>
<s>
Since	O
2004	O
,	O
Håkon	O
Wium	O
Lie	O
,	O
the	O
co-creator	O
of	O
CSS	B-Language
,	O
has	O
been	O
chairman	O
of	O
the	O
board	O
.	O
</s>
<s>
In	O
April	O
2003	O
,	O
Prince	O
1.0	O
was	O
released	O
,	O
with	O
basic	O
support	O
for	O
XHTML	B-Language
,	O
Cascading	B-Language
Style	I-Language
Sheets	I-Language
(	O
CSS	B-Language
)	O
,	O
Scalable	B-Application
Vector	I-Application
Graphics	I-Application
(	O
SVG	B-Application
)	O
,	O
and	O
arbitrary	O
XML	B-Protocol
.	O
</s>
<s>
This	O
first	O
version	O
was	O
a	O
command-line	B-Application
program	I-Application
that	O
supported	O
Microsoft	B-Application
Windows	I-Application
and	O
Linux	B-Application
;	O
there	O
was	O
no	O
graphical	B-Application
user	I-Application
interface	I-Application
for	O
Windows	O
yet	O
.	O
</s>
<s>
It	O
was	O
the	O
third	O
user	B-Protocol
agent	I-Protocol
to	O
pass	O
the	O
test	O
,	O
after	O
Safari	B-Application
and	O
Konqueror	B-Application
.	O
</s>
<s>
In	O
subsequent	O
releases	O
,	O
CSS	B-Language
support	O
has	O
steadily	O
been	O
extended	O
,	O
both	O
to	O
have	O
comparable	O
support	O
with	O
web	O
browsers	O
(	O
such	O
as	O
Opera	B-Application
and	O
Firefox	B-Application
)	O
,	O
and	O
to	O
add	O
support	O
for	O
print-specific	O
features	O
,	O
like	O
page	O
breaks	O
and	O
footnotes	O
.	O
</s>
<s>
Prince	O
is	O
available	O
for	O
several	O
platforms	O
,	O
including	O
Windows	O
,	O
Linux	B-Application
,	O
macOS	B-Application
,	O
FreeBSD	B-Operating_System
,	O
and	O
Solaris	B-Application
.	O
</s>
<s>
Wrappers	O
are	O
available	O
for	O
Java	B-Language
SE	I-Language
,	O
.NET	B-Application
Framework	I-Application
,	O
ActiveX	B-Application
,	O
PHP	B-Application
,	O
Ruby	B-Application
on	I-Application
Rails	I-Application
and	O
Node.js	B-Language
to	O
help	O
integrate	O
Prince	O
into	O
websites	O
and	O
apps	O
.	O
</s>
<s>
Prince	O
was	O
developed	O
primarily	O
using	O
the	O
Mercury	B-Operating_System
functional	O
logic	O
programming	O
language	O
.	O
</s>
<s>
The	O
main	O
driving	O
force	O
behind	O
Prince	O
is	O
the	O
standard	O
CSS3-paged	O
that	O
integrates	O
paged	O
media	O
(	O
including	O
PDF	B-Application
)	O
layout	O
specification	O
with	O
any	O
other	O
W3C	O
technologies	O
:	O
HTML4	O
,	O
HTML5	B-Application
,	O
XHTML	B-Language
,	O
and	O
"	O
free	O
XML	B-Protocol
"	O
,	O
working	O
or	O
not	O
with	O
JavaScript	B-Language
.	O
</s>
<s>
More	O
experimental	O
facilities	O
for	O
print	O
needs	O
(	O
for	O
example	O
,	O
footnote	O
policies	O
,	O
specifying	O
the	O
size	O
of	O
the	O
bleed	O
area	O
of	O
the	O
page	O
when	O
crop	O
marks	O
are	O
enabled	O
,	O
creating	O
running	O
page	O
headers	O
and	O
footers	O
and	O
similar	O
)	O
are	O
being	O
standardized	O
in	O
the	O
CSS	B-Language
module	O
.	O
</s>
<s>
Prince	O
has	O
good	O
support	O
for	O
CSS	B-Language
,	O
with	O
a	O
print	O
focus	O
:	O
better	O
than	O
web	O
browsers	O
for	O
print-specific	O
CSS	B-Language
modules	O
such	O
as	O
the	O
aforementioned	O
css-page-3	O
and	O
css-gcpm-3	O
;	O
while	O
support	O
other	O
modules	O
is	O
good	O
relative	O
to	O
other	O
user	B-Protocol
agents	I-Protocol
not	O
using	O
a	O
web	B-Protocol
browser	I-Protocol
engine	I-Protocol
but	O
not	O
always	O
as	O
well	O
as	O
web	O
browsers	O
:	O
for	O
example	O
,	O
CSS	B-Language
Flexible	O
Box	O
Model	O
was	O
added	O
in	O
Prince	O
12	O
(	O
2018	O
)	O
,	O
whereas	O
CSS	B-Language
Grid	O
Layout	O
(	O
css-grid-1	O
)	O
is	O
not	O
yet	O
present	O
in	O
Prince	O
14	O
.	O
</s>
