<s>
Page	B-Language
Interchange	I-Language
Language	I-Language
also	O
known	O
as	O
Publishing	B-Language
Interchange	I-Language
Language	I-Language
,	O
or	O
"	O
PIL	O
"	O
is	O
a	O
public	O
domain	O
language	O
that	O
allows	O
precise	O
description	O
of	O
the	O
layout	O
of	O
content	O
on	O
pages	O
,	O
groups	O
of	O
multiple	O
pages	O
or	O
any	O
2-dimensional	O
area	O
,	O
which	O
it	O
calls	O
a	O
"	O
canvas.	O
"	O
</s>
<s>
At	O
the	O
time	O
,	O
typesetting	O
and	O
physically	O
cut	B-General_Concept
and	I-General_Concept
pasting	I-General_Concept
of	O
images	O
was	O
still	O
required	O
to	O
assemble	O
many	O
pages	O
because	O
the	O
specialized	O
composition	O
,	O
pagination	O
,	O
text	O
formatting	O
,	O
and	O
graphic	O
design	O
systems	O
that	O
produced	O
the	O
content	O
could	O
not	O
operate	O
together	O
to	O
produce	O
integrated	O
output	O
.	O
</s>
<s>
It	O
enables	O
any	O
publishing	O
workflow	B-Operating_System
of	O
either	O
sequential	O
or	O
simultaneous	O
layout	O
and	O
content	O
creation	O
.	O
</s>
<s>
The	O
complete	O
of	O
PIL	O
includes	O
the	O
language	O
specification	O
document	O
(	O
including	O
a	O
BNF	O
specification	O
,	O
example	O
files	O
,	O
a	O
programmer	O
's	O
guide	O
,	O
and	O
C-language	B-Language
source	O
code	O
for	O
a	O
parser	O
and	O
an	O
output	O
engine	O
to	O
produce	O
PIL	O
.	O
</s>
<s>
The	O
source	O
code	O
is	O
highly	O
portable	O
to	O
any	O
platform	O
that	O
supports	O
C	B-Language
,	O
either	O
in	O
the	O
ANSI	O
C	B-Language
or	O
earlier	O
K&R	O
forms	O
.	O
</s>
