<s>
A	O
transformation	B-Application
language	I-Application
is	O
a	O
computer	B-Language
language	I-Language
designed	O
to	O
transform	O
some	O
input	O
text	O
in	O
a	O
certain	O
formal	O
language	O
into	O
a	O
modified	O
output	O
text	O
that	O
meets	O
some	O
specific	O
goal	O
.	O
</s>
<s>
Program	B-Application
transformation	I-Application
systems	I-Application
such	O
as	O
Stratego/XT	O
,	O
TXL	B-Language
,	O
Tom	B-Application
,	O
DMS	B-Application
,	O
and	O
ASF+SDF	O
all	O
have	O
transformation	B-Application
languages	I-Application
as	O
a	O
major	O
component	O
.	O
</s>
<s>
The	O
transformation	B-Application
languages	I-Application
for	O
these	O
systems	O
are	O
driven	O
by	O
declarative	O
descriptions	O
of	O
the	O
structure	O
of	O
the	O
input	O
text	O
(	O
typically	O
a	O
grammar	O
)	O
,	O
allowing	O
them	O
to	O
be	O
applied	O
to	O
wide	O
variety	O
of	O
formal	O
languages	O
and	O
documents	O
.	O
</s>
<s>
Macro	O
languages	O
are	O
a	O
kind	O
of	O
transformation	B-Application
languages	I-Application
to	O
transform	O
a	O
meta	O
language	O
into	O
specific	O
higher	O
programming	O
language	O
like	O
Java	B-Language
,	O
C++	B-Language
,	O
Fortran	B-Application
or	O
into	O
lower-level	O
Assembly	B-Language
language	I-Language
.	O
</s>
<s>
In	O
the	O
model-driven	B-Language
engineering	I-Language
technical	O
space	O
,	O
there	O
are	O
model	B-Language
transformation	I-Language
languages	I-Language
(	O
MTLs	O
)	O
,	O
that	O
take	O
as	O
input	O
models	O
conforming	O
to	O
a	O
given	O
metamodel	O
and	O
produce	O
as	O
output	O
models	O
conforming	O
to	O
a	O
different	O
metamodel	O
.	O
</s>
<s>
An	O
example	O
of	O
such	O
a	O
language	O
is	O
the	O
QVT	B-Language
OMG	B-Architecture
standard	O
.	O
</s>
<s>
There	O
are	O
also	O
low-level	O
languages	O
such	O
as	O
the	O
Lx	O
family	O
implemented	O
by	O
the	O
bootstrapping	B-Application
method	I-Application
.	O
</s>
<s>
The	O
L0	O
language	O
may	O
be	O
considered	O
as	O
assembler	B-Language
for	O
transformation	B-Application
languages	I-Application
.	O
</s>
<s>
There	O
are	O
a	O
number	O
of	O
XML	B-Language
transformation	I-Language
languages	I-Language
.	O
</s>
<s>
These	O
include	O
Tritium	B-Language
,	O
XSLT	B-Application
,	O
XQuery	B-Language
,	O
STX	O
,	O
FXT	B-Language
,	O
XDuce	B-Language
,	O
CDuce	B-Language
,	O
HaXml	B-Language
,	O
XMLambda	B-Language
,	O
and	O
FleXML	B-Language
.	O
</s>
