<s>
JetPAG	B-Application
(	O
Jet	O
Parser	B-Language
Auto-Generator	O
)	O
is	O
an	O
open-source	B-Application
LL(k )	O
parser	B-Language
and	O
lexical	B-Application
analyzer	I-Application
generator	B-Language
,	O
licensed	O
under	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
.	O
</s>
<s>
Tareq	O
started	O
JetPAG	B-Application
as	O
a	O
small	O
program	O
written	O
for	O
practice	O
purposes	O
only	O
.	O
</s>
<s>
Soon	O
when	O
it	O
started	O
expanding	O
many	O
goals	O
were	O
added	O
rapidly	O
,	O
and	O
it	O
was	O
obvious	O
that	O
JetPAG	B-Application
is	O
worthy	O
being	O
a	O
complete	O
project	O
.	O
</s>
<s>
Real	O
development	O
of	O
JetPAG	B-Application
started	O
in	O
late	O
2005	O
,	O
targeting	O
a	O
complete	O
framework	O
for	O
a	O
powerful	O
recursive	B-Application
descent	I-Application
lexical	B-Application
analyzer	I-Application
and	O
parser	B-Language
generator	I-Language
with	O
emphasis	O
on	O
ease	O
of	O
use	O
,	O
code	O
readability	O
and	O
high	O
performance	O
of	O
generated	O
code	O
.	O
</s>
<s>
After	O
a	O
long	O
period	O
of	O
in-house	O
development	O
and	O
testing	O
,	O
the	O
first	O
development	O
package	O
of	O
JetPAG	B-Application
was	O
released	O
through	O
SourceForge	B-Application
on	O
18	O
November	O
2006	O
.	O
</s>
<s>
Development	O
of	O
JetPAG	B-Application
is	O
current	O
at	O
beta	O
stage	O
,	O
current	O
version	O
is	O
0.6.1	O
.	O
</s>
<s>
Jetpag	B-Application
incorporates	O
several	O
modules	O
:	O
the	O
front	O
end	O
,	O
the	O
analyzers	O
and	O
the	O
code	O
generators	O
.	O
</s>
<s>
The	O
analyzers	O
mainly	O
perform	O
two	O
operations	O
through	O
tree	B-Algorithm
traversal	I-Algorithm
.	O
</s>
<s>
From	O
lookahead	O
paths	O
,	O
lookahead	O
sets	O
are	O
transformed	O
to	O
a	O
nested	O
tree	O
form	O
,	O
gaining	O
a	O
great	O
overall	O
efficiency	O
and	O
improvement	O
in	O
most	B-General_Concept
cases	I-General_Concept
.	O
</s>
<s>
Currently	O
,	O
JetPAG	B-Application
generates	O
source	O
code	O
in	O
C++	B-Language
only	O
.	O
</s>
<s>
The	O
nature	O
of	O
JetPAG	B-Application
's	O
metalanguage	O
and	O
framework	O
makes	O
it	O
easy	O
and	O
simple	O
to	O
integrate	O
generated	O
recognizers	O
into	O
larger	O
applications	O
.	O
</s>
<s>
JetPAG	B-Application
also	O
includes	O
some	O
facilities	O
in	O
the	O
provided	O
framework	O
to	O
aid	O
developers	O
with	O
small	O
utilities	O
and	O
save	O
development	O
time	O
from	O
many	O
minimal	O
language	O
recognition	O
tasks	O
.	O
</s>
<s>
JetPAG	B-Application
's	O
grammars	O
are	O
written	O
in	O
a	O
meta	O
language	O
based	O
on	O
the	O
EBNF	O
form	O
and	O
regular	B-Language
expressions	I-Language
,	O
with	O
extensive	O
additions	O
and	O
tweaks	O
.	O
</s>
<s>
The	O
meta	O
language	O
of	O
JetPAG	B-Application
grammars	O
was	O
designed	O
to	O
be	O
maximally	O
flexible	O
handle	O
both	O
simple	O
grammars	O
and	O
large	O
,	O
complicated	O
ones	O
easily	O
.	O
</s>
<s>
Parsers	B-Language
and	O
lexical	B-Application
analyzers	I-Application
are	O
similarly	O
defined	O
and	O
generated	O
for	O
simplicity	O
and	O
ease	O
of	O
use	O
.	O
</s>
