<s>
CDuce	B-Language
is	O
an	O
XML-oriented	O
functional	B-Language
language	I-Language
,	O
which	O
extends	O
XDuce	B-Language
in	O
a	O
few	O
directions	O
.	O
</s>
<s>
It	O
features	O
XML	B-Protocol
regular	B-Language
expression	I-Language
types	O
,	O
XML	B-Protocol
regular	B-Language
expression	I-Language
patterns	O
,	O
</s>
<s>
XML	B-Protocol
iterators	O
.	O
</s>
<s>
CDuce	B-Language
conforms	O
to	O
basic	O
standards	O
:	O
Unicode	O
,	O
XML	B-Protocol
,	O
DTD	B-Language
,	O
Namespaces	O
are	O
fully	O
supported	O
,	O
XML	B-Protocol
Schema	O
is	O
partially	O
supported	O
.	O
</s>
<s>
smooth	O
and	O
safe	O
compositions	O
of	O
XML	B-Language
transformations	I-Language
and	O
incremental	O
programming	O
;	O
</s>
<s>
complete	O
integration	O
with	O
OCaml	B-Language
(	O
OCaml	B-Language
libraries	O
can	O
be	O
straightforwardly	O
imported	O
and	O
CDuce	B-Language
programs	O
can	O
be	O
exported	O
to	O
OCaml	B-Language
)	O
.	O
</s>
<s>
XML	B-Protocol
objects	O
can	O
be	O
manipulated	O
as	O
first-class	O
citizen	O
values	O
:	O
elements	O
,	O
sequences	O
,	O
tags	O
,	O
characters	O
and	O
strings	O
,	O
attribute	O
sets	O
;	O
sequences	O
of	O
XML	B-Protocol
elements	O
can	O
be	O
specified	O
by	O
regular	B-Language
expressions	I-Language
,	O
which	O
also	O
apply	O
to	O
characters	O
strings	O
;	O
</s>
<s>
a	O
powerful	O
pattern	O
matching	O
operation	O
can	O
perform	O
complex	O
extractions	O
from	O
sequences	O
of	O
XML	B-Protocol
elements	O
;	O
</s>
<s>
a	O
rich	O
type	O
algebra	O
,	O
with	O
recursive	O
types	O
and	O
arbitrary	O
boolean	O
combinations	O
(	O
union	O
,	O
intersection	O
,	O
complement	O
)	O
allows	O
precise	O
definitions	O
of	O
data	O
structures	O
and	O
XML	B-Protocol
types	O
;	O
general	O
purpose	O
types	O
and	O
types	O
constructors	O
are	O
taken	O
seriously	O
(	O
products	O
,	O
extensible	O
records	O
,	O
arbitrary	O
precision	O
integers	O
with	O
interval	O
constraints	O
,	O
Unicode	O
characters	O
)	O
;	O
</s>
<s>
polymorphism	B-Application
through	O
a	O
natural	O
notion	O
of	O
subtyping	O
,	O
and	O
overloaded	O
functions	O
with	O
dynamic	O
dispatch	O
;	O
</s>
