<s>
X3J13	B-Language
is	O
the	O
name	O
of	O
a	O
technical	O
committee	O
which	O
was	O
part	O
of	O
the	O
International	O
Committee	O
for	O
Information	O
Technology	O
Standards	O
(	O
INCITS	O
,	O
then	O
named	O
X3	O
)	O
.	O
</s>
<s>
The	O
X3J13	B-Language
committee	O
was	O
formed	O
in	O
1986	O
to	O
draw	O
up	O
an	O
American	O
National	O
Standards	O
Institute	O
(	O
ANSI	O
)	O
Common	B-Language
Lisp	I-Language
standard	O
based	O
on	O
the	O
first	O
edition	O
of	O
the	O
book	O
Common	B-Language
Lisp	I-Language
the	O
Language	O
(	O
also	O
termed	O
CLtL	O
,	O
or	O
CLtL1	O
)	O
,	O
by	O
Guy	O
L	O
.	O
Steele	O
Jr.	O
,	O
which	O
was	O
formerly	O
a	O
de	O
facto	O
standard	O
for	O
the	O
language	O
.	O
</s>
<s>
The	O
primary	O
output	O
of	O
X3J13	B-Language
was	O
an	O
American	O
National	O
Standard	O
for	O
programming	O
language	O
Common	B-Language
Lisp	I-Language
(	O
X3.226/1994	O
)	O
,	O
approved	O
December	O
8	O
,	O
1994	O
.	O
</s>
<s>
X3J13	B-Language
later	O
worked	O
with	O
International	O
Organization	O
for	O
Standardization	O
(	O
ISO	O
)	O
working	O
group	O
SC22/WG16	B-Language
on	O
an	O
internationally	O
standardised	O
dialect	O
of	O
Lisp	B-Language
named	O
ISLISP	B-Language
.	O
</s>
<s>
These	O
issue	O
writeups	O
,	O
while	O
not	O
themselves	O
part	O
of	O
the	O
standard	O
,	O
were	O
deemed	O
sufficiently	O
useful	O
for	O
the	O
Common	B-Language
Lisp	I-Language
HyperSpec	I-Language
to	O
include	O
and	O
cross-reference	O
them	O
for	O
the	O
benefit	O
of	O
readers	O
,	O
providing	O
information	O
about	O
the	O
original	O
intent	O
of	O
the	O
committee	O
in	O
its	O
decisions	O
.	O
</s>
<s>
Chaired	O
by	O
Sandra	O
Loosemore	O
,	O
this	O
subcommittee	O
created	O
proposals	O
for	O
issues	O
relating	O
to	O
Lisp	B-Language
compiling	B-Language
.	O
</s>
<s>
Guy	O
Steele	O
acknowledged	O
in	O
the	O
second	O
edition	O
of	O
Common	B-Language
Lisp	I-Language
the	O
Language	O
the	O
large	O
contribution	O
of	O
the	O
Compiler	B-Language
Subcommittee	O
toward	O
clarifying	O
the	O
compiling	B-Language
process	O
described	O
in	O
the	O
first	O
edition	O
,	O
parts	O
of	O
which	O
Steele	O
describes	O
as	O
"	O
vague	O
"	O
.	O
</s>
<s>
Jon	O
L	O
.	O
White	O
was	O
the	O
chair	O
of	O
the	O
Iteration	B-Algorithm
Subcommittee	O
.	O
</s>
<s>
Among	O
the	O
issues	O
dealt	O
with	O
by	O
this	O
group	O
was	O
the	O
generalized	O
LOOP	O
macro	O
–	O
a	O
domain-specific	B-Language
language	I-Language
to	O
which	O
the	O
second	O
edition	O
of	O
CLtL	O
devotes	O
a	O
full	O
chapter	O
.	O
</s>
<s>
The	O
"	O
ALGOL-like	B-Language
"	O
syntax	O
of	O
this	O
macro	O
,	O
differing	O
from	O
Lisp	B-Language
's	O
more	O
usual	O
s-expression	B-Protocol
syntax	O
,	O
was	O
and	O
remains	O
somewhat	O
controversial	O
.	O
</s>
<s>
The	O
Character	O
Subcommittee	O
,	O
chaired	O
by	O
Thom	O
Linden	O
,	O
had	O
the	O
task	O
of	O
defining	O
how	O
the	O
standard	O
would	O
deal	O
with	O
the	O
issues	O
surrounding	O
different	O
character	B-General_Concept
sets	I-General_Concept
.	O
</s>
<s>
The	O
resolution	O
of	O
these	O
matters	O
,	O
particularly	O
the	O
ability	O
to	O
use	O
any	O
character	O
in	O
the	O
name	O
of	O
a	O
symbol	O
,	O
was	O
intended	O
to	O
make	O
Common	B-Language
Lisp	I-Language
simpler	O
for	O
international	O
users	O
.	O
</s>
<s>
Chaired	O
by	O
Kent	O
Pitman	O
,	O
the	O
Error	B-General_Concept
Handling	I-General_Concept
Subcommittee	O
plugged	O
what	O
was	O
described	O
as	O
"	O
the	O
biggest	O
outstanding	O
hole	O
in	O
Common	B-Language
Lisp	I-Language
"	O
with	O
the	O
condition	O
system	O
,	O
a	O
general	O
mechanism	O
for	O
handling	O
errors	B-General_Concept
,	O
warnings	O
,	O
and	O
other	O
exceptional	O
situations	O
.	O
</s>
<s>
This	O
use	O
of	O
the	O
term	O
"	O
signal	O
"	O
is	O
different	O
from	O
the	O
typical	O
operating	B-General_Concept
system	I-General_Concept
's	O
notion	O
of	O
signals	B-Operating_System
(	O
except	O
on	O
Lisp	B-Operating_System
machines	I-Operating_System
where	O
this	O
variant	O
use	O
of	O
the	O
term	O
evolved	O
)	O
;	O
the	O
operating	B-General_Concept
system	I-General_Concept
notion	O
of	O
signaling	B-Operating_System
was	O
out	O
of	O
scope	O
for	O
this	O
committee	O
,	O
and	O
consequently	O
was	O
not	O
addressed	O
in	O
the	O
ANSI	B-Language
Common	I-Language
Lisp	I-Language
standard	I-Language
.	O
</s>
<s>
Further	O
,	O
the	O
subcommittee	O
oversaw	O
efforts	O
to	O
keep	O
terminology	B-Language
consistent	O
and	O
accurate	O
throughout	O
the	O
committee	O
's	O
activities	O
.	O
</s>
<s>
The	O
final	O
standard	O
produced	O
by	O
the	O
X3J13	B-Language
committee	O
was	O
published	O
as	O
American	O
National	O
Standard	O
X3.226	O
,	O
and	O
also	O
in	O
hypertext	O
form	O
as	O
the	O
Common	B-Language
Lisp	I-Language
HyperSpec	I-Language
.	O
</s>
<s>
The	O
book	O
Common	B-Language
Lisp	I-Language
the	O
Language	O
,	O
although	O
authored	O
mostly	O
by	O
Guy	O
L	O
.	O
Steele	O
Jr.	O
,	O
was	O
the	O
product	O
of	O
an	O
ad	O
hoc	O
committee	O
that	O
had	O
formed	O
around	O
1980	O
and	O
had	O
worked	O
collaboratively	O
to	O
produce	O
the	O
original	O
de	O
facto	O
standard	O
for	O
Common	B-Language
Lisp	I-Language
before	O
the	O
formation	O
of	O
X3J13	B-Language
.	O
</s>
<s>
X3J13	B-Language
began	O
its	O
work	O
with	O
Common	B-Language
Lisp	I-Language
the	O
Language	O
as	O
a	O
base	O
document	O
and	O
proceeded	O
from	O
there	O
in	O
the	O
design	O
of	O
what	O
would	O
become	O
ANSI	B-Language
Common	I-Language
Lisp	I-Language
.	O
</s>
<s>
Documents	O
published	O
by	O
X3J13	B-Language
were	O
later	O
used	O
,	O
together	O
with	O
quotations	O
from	O
certain	O
committee	O
members	O
,	O
in	O
the	O
production	O
of	O
Common	B-Language
Lisp	I-Language
the	O
Language	O
Second	O
Edition	O
,	O
which	O
was	O
released	O
in	O
1990	O
,	O
giving	O
the	O
Common	B-Language
Lisp	I-Language
community	O
a	O
way	O
to	O
preview	O
many	O
features	O
that	O
were	O
expected	O
to	O
appear	O
in	O
the	O
committee	O
's	O
final	O
standard	O
document	O
.	O
</s>
<s>
In	O
sum	O
,	O
the	O
original	O
edition	O
of	O
Common	B-Language
Lisp	I-Language
the	O
Language	O
was	O
the	O
document	O
on	O
which	O
X3J13	B-Language
originally	O
based	O
its	O
work	O
.	O
</s>
<s>
The	O
Second	O
Edition	O
,	O
by	O
contrast	O
,	O
was	O
Steele	O
's	O
own	O
work	O
,	O
not	O
a	O
committee	O
product	O
and	O
had	O
no	O
official	O
status	O
within	O
X3J13	B-Language
or	O
ANSI	O
.	O
</s>
<s>
As	O
acknowledged	O
in	O
the	O
Second	O
Edition	O
preface	O
,	O
it	O
was	O
not	O
authorized	O
by	O
X3J13	B-Language
,	O
the	O
choice	O
of	O
content	O
as	O
a	O
snapshot	O
of	O
the	O
work	O
in	O
progress	O
was	O
not	O
formally	O
synchronized	O
with	O
X3J13	B-Language
,	O
and	O
the	O
final	O
version	O
was	O
not	O
reviewed	O
or	O
approved	O
by	O
X3J13	B-Language
.	O
</s>
