<s>
POSXML	B-Language
(	O
acronym	O
for	O
Point	O
Of	O
Sale	O
eXtended	O
Markup	O
Language	O
)	O
is	O
a	O
programming	O
language	O
,	O
based	O
on	O
XML	B-Protocol
,	O
that	O
is	O
used	O
to	O
create	O
applications	O
for	O
a	O
POS	O
terminal	O
.	O
</s>
<s>
Normally	O
the	O
programming	O
language	O
used	O
to	O
develop	O
such	O
applications	O
is	O
C	B-Language
or	O
C++	B-Language
.	O
</s>
<s>
The	O
main	O
purpose	O
of	O
POSXML	B-Language
is	O
to	O
simplify	O
the	O
development	O
of	O
applications	O
for	O
POS	O
terminals	O
.	O
</s>
<s>
POSXML	B-Language
is	O
organized	O
and	O
structured	O
in	O
the	O
form	O
of	O
tags	O
,	O
showing	O
levels	O
and	O
subsets	O
of	O
a	O
set	O
of	O
commands	O
and	O
instructions	O
,	O
that	O
form	O
the	O
logical	O
structure	O
of	O
a	O
POSXML	B-Language
application	O
.	O
</s>
<s>
Similar	O
to	O
the	O
vast	O
majority	O
of	O
existing	O
programming	O
languages	O
,	O
POSXML	B-Language
is	O
compiled	O
in	O
a	O
specific	O
format	O
to	O
reduce	O
the	O
file	O
size	O
which	O
allows	O
the	O
application	O
to	O
be	O
run	O
on	O
a	O
POS	O
terminal	O
using	O
a	O
framework	O
(	O
virtual	O
machine	O
)	O
.	O
</s>
<s>
When	O
compiled	O
,	O
a	O
program	O
written	O
in	O
POSXML	B-Language
,	O
becomes	O
a	O
set	O
of	O
bytecodes	O
that	O
are	O
interpreted	O
by	O
the	O
virtual	O
machine	O
on	O
the	O
POS	O
terminal	O
which	O
results	O
in	O
the	O
implementation	O
on	O
the	O
POS	O
terminal	O
.	O
</s>
<s>
The	O
commands	O
and	O
instructions	O
of	O
POSXML	B-Language
,	O
such	O
as	O
the	O
compliance	O
on	O
the	O
use	O
of	O
capital	O
letters	O
and	O
lowercase	O
letters	O
(	O
case	O
sensitive	O
)	O
,	O
are	O
acquired	O
through	O
training	O
.	O
</s>
<s>
Because	O
it	O
is	O
a	O
structured	O
language	O
based	O
on	O
XML	B-Protocol
,	O
POSXML	B-Language
is	O
a	O
language	O
that	O
is	O
constantly	O
evolving	O
,	O
new	O
commands	O
and	O
instructions	O
can	O
be	O
added	O
to	O
your	O
library	O
at	O
any	O
time	O
.	O
</s>
<s>
Variables	O
in	O
POSXML	B-Language
are	O
typed	O
;	O
there	O
are	O
only	O
two	O
types	O
,	O
integer	O
and	O
string	O
.	O
</s>
<s>
POSXML	B-Language
limits	O
the	O
number	O
of	O
declared	O
variables	O
to	O
512	O
.	O
</s>
<s>
They	O
are	O
shared	O
throughout	O
all	O
the	O
scheduled	O
pages	O
of	O
the	O
POSXML	B-Language
program	O
in	O
runtime	O
process	O
.	O
</s>
<s>
In	O
POSXML	B-Language
the	O
commands	O
inttostring	O
and	O
stringtoint	O
are	O
used	O
for	O
this	O
.	O
</s>
<s>
The	O
POSXML	B-Language
language	O
works	O
with	O
files	O
of	O
type	O
WALK	O
dbFile	O
(	O
A	O
file	O
system	O
defined	O
by	O
the	O
framework	O
that	O
interprets	O
a	O
program	O
compiled	O
POSXML	B-Language
)	O
.	O
</s>
<s>
There	O
are	O
8	O
basic	O
commands	O
in	O
the	O
POSXML	B-Language
language	O
to	O
work	O
with	O
files	O
in	O
the	O
POS	O
terminal	O
,	O
they	O
are	O
.	O
</s>
