<s>
Semantic	B-Application
dictionary	I-Application
encoding	I-Application
(	O
SDE	O
)	O
preserves	O
the	O
full	O
semantic	O
context	O
of	O
source	O
programs	O
while	O
adding	O
further	O
information	O
that	O
can	O
be	O
used	O
for	O
accelerating	O
the	O
speed	O
of	O
code	B-Application
generation	I-Application
.	O
</s>
<s>
It	O
is	O
code	B-Application
generation	I-Application
at	O
load	O
time	O
.	O
</s>
<s>
In	O
an	O
elementary	O
form	O
,	O
the	O
dictionary	O
entries	O
represent	O
nodes	O
in	O
a	O
directed	O
acyclic	O
graph	O
(	O
DAG	O
)	O
,	O
that	O
describes	O
the	O
actions	O
of	O
the	O
program	O
,	O
as	O
an	O
abstract	B-Data_Structure
syntax	I-Data_Structure
tree	I-Data_Structure
(	O
AST	O
)	O
in	O
tabular	O
form	O
.	O
</s>
<s>
It	O
uses	O
an	O
intermediate	B-Application
representation	I-Application
(	O
IR	B-Application
)	O
,	O
that	O
is	O
based	O
on	O
the	O
encoded	O
abstract	B-Data_Structure
syntax	I-Data_Structure
tree	I-Data_Structure
and	O
symbol	B-Application
table	I-Application
of	O
a	O
program	O
.	O
</s>
