<s>
DIANA	B-Language
,	O
the	O
Descriptive	O
Intermediate	O
Attributed	O
Notation	O
for	O
Ada	B-Language
,	O
is	O
an	O
intermediate	O
language	O
used	O
to	O
represent	O
the	O
semantics	O
of	O
an	O
Ada	B-Language
program	O
.	O
</s>
<s>
DIANA	B-Language
is	O
also	O
used	O
by	O
PL/SQL	B-Language
,	O
which	O
is	O
based	O
on	O
Ada	B-Language
.	O
</s>
<s>
DIANA	B-Language
is	O
an	O
abstract	O
data	O
type	O
;	O
its	O
concrete	O
implementations	O
are	O
defined	O
using	O
the	O
IDL	B-Language
specification	I-Language
language	I-Language
.	O
</s>
<s>
DIANA	B-Language
descends	O
from	O
TCOL	O
and	O
AIDA	O
,	O
earlier	O
representations	O
of	O
Ada	B-Language
programs	O
.	O
</s>
<s>
The	O
Ada-0	O
subset	O
of	O
Ada	B-Language
at	O
Karlsruhe	O
(	O
1980	O
)	O
was	O
first	O
using	O
AIDA	O
,	O
but	O
later	O
AIDA	O
got	O
replaced	O
by	O
DIANA	B-Language
.	O
</s>
<s>
The	O
full	O
Karlsruhe	O
Ada	B-Language
compilation	O
system	O
used	O
DIANA	B-Language
as	O
well	O
and	O
the	O
IDL	O
External	O
Representation	O
for	O
marshalling	B-Application
between	O
the	O
middle-end	O
and	O
the	O
code	O
generating	O
back-end	O
.	O
</s>
