<s>
SXML	B-Language
is	O
an	O
alternative	O
syntax	O
for	O
writing	O
XML	B-Protocol
data	O
(	O
more	O
precisely	O
,	O
XML	B-Protocol
Infosets	O
)	O
as	O
S-expressions	B-Protocol
,	O
to	O
facilitate	O
working	O
with	O
XML	B-Protocol
data	O
in	O
Lisp	B-Language
and	O
Scheme	B-Language
.	O
</s>
<s>
An	O
associated	O
suite	O
of	O
tools	O
implements	O
XPath	B-Language
,	O
SAX	B-Application
and	O
XSLT	B-Application
for	O
SXML	B-Language
in	O
Scheme	B-Language
and	O
are	O
available	O
in	O
the	O
GNU	B-Application
Guile	I-Application
implementation	O
of	O
that	O
language	O
.	O
</s>
<s>
Textual	O
correspondence	O
between	O
SXML	B-Language
and	O
XML	B-Protocol
for	O
a	O
sample	O
XML	B-Protocol
snippet	O
is	O
shown	O
below	O
:	O
</s>
<s>
Compared	O
to	O
other	O
alternative	O
representations	O
for	O
XML	B-Protocol
and	O
its	O
associated	O
languages	O
,	O
SXML	B-Language
has	O
the	O
benefit	O
of	O
being	O
directly	O
parsable	O
by	O
existing	O
Scheme	B-Language
implementations	O
.	O
</s>
<s>
Take	O
the	O
following	O
simple	O
XHTML	B-Language
page	O
:	O
</s>
<s>
After	O
translating	O
it	O
to	O
SXML	B-Language
,	O
the	O
same	O
page	O
now	O
looks	O
like	O
this	O
:	O
</s>
<s>
There	O
is	O
no	O
special	O
syntax	O
required	O
for	O
XML	B-Protocol
attributes	O
.	O
</s>
<s>
In	O
SXML	B-Language
they	O
are	O
simply	O
represented	O
as	O
just	O
another	O
node	O
,	O
which	O
has	O
the	O
special	O
name	O
of	O
@	O
.	O
</s>
<s>
This	O
ca	O
n't	O
cause	O
a	O
name	O
clash	O
with	O
an	O
actual	O
"	O
@	O
"	O
tag	O
,	O
because	O
@	O
is	O
not	O
allowed	O
as	O
a	O
tag	O
name	O
in	O
XML	B-Protocol
.	O
</s>
<s>
This	O
is	O
a	O
common	O
pattern	O
in	O
SXML	B-Language
:	O
anytime	O
a	O
tag	O
is	O
used	O
to	O
indicate	O
a	O
special	O
status	O
or	O
something	O
that	O
is	O
not	O
possible	O
in	O
XML	B-Protocol
,	O
a	O
name	O
is	O
used	O
that	O
does	O
not	O
constitute	O
a	O
valid	O
XML	B-Protocol
identifier	O
.	O
</s>
<s>
In	O
SXML	B-Language
strings	O
there	O
is	O
one	O
character	O
that	O
must	O
be	O
escaped	O
,	O
the	O
"	O
string	O
delimiter	O
(	O
with	O
\	O
 "	O
)	O
.	O
</s>
<s>
XML	B-Protocol
requires	O
escaping	O
two	O
,	O
&	O
and	O
(	O
with	O
amp	O
;	O
and	O
lt	O
;	O
respectively	O
)	O
.	O
</s>
