<s>
The	O
key	O
implementation	O
technique	O
of	O
GenVoca	B-Application
is	O
due	O
to	O
Smaragdakis	O
called	O
mixin-layers	O
.	O
</s>
<s>
Aspectual	O
mixin	B-General_Concept
layers	I-General_Concept
and	O
aspectual	O
feature	O
modules	O
are	O
recent	O
extensions	O
that	O
incorporate	O
aspect-oriented	B-Architecture
programming	I-Architecture
.	O
</s>
