<s>
XRuby	B-Application
was	O
the	O
first	O
Ruby	B-Language
to	O
Java	O
static	O
compiler	O
which	O
compiles	O
Ruby	B-Language
source	O
code	O
(	O
.rb	O
)	O
to	O
Java	B-Language
bytecode	I-Language
(	O
.class	O
)	O
.	O
</s>
<s>
It	O
is	O
notable	O
because	O
it	O
contains	O
a	O
complete	O
ANTLR	B-Application
grammar	O
for	O
Ruby	B-Language
1.8	O
source	O
code	O
.	O
</s>
