<s>
Abstract-Type	B-Language
and	I-Language
Scheme-Definition	I-Language
Language	I-Language
(	O
ASDL	O
)	O
is	O
a	O
computer	B-Language
language	I-Language
developed	O
as	O
part	O
of	O
ESPRIT	O
project	O
GRASPIN	O
,	O
as	O
a	O
basis	O
for	O
generating	O
language-based	O
editors	O
and	O
environments	O
.	O
</s>
<s>
It	O
combines	O
an	O
object-oriented	B-Language
type	O
system	O
,	O
syntax-directed	B-Application
translation	I-Application
schemes	I-Application
and	O
a	O
target-language	O
interface	O
.	O
</s>
