<s>
CEPT	B-Device
Recommendation	I-Device
T/CD	I-Device
06-01	I-Device
was	O
a	O
standard	O
set	O
in	O
1981	O
by	O
the	O
European	O
Conference	O
of	O
Postal	O
and	O
Telecommunications	O
Administrations	O
(	O
CEPT	O
)	O
for	O
the	O
display	O
of	O
Videotex	B-Operating_System
;	O
specifically	O
,	O
for	O
the	O
Videotex	B-Operating_System
Presentation	O
Layer	O
Data	O
Syntax	O
.	O
</s>
<s>
The	O
standard	O
aimed	O
to	O
bring	O
a	O
degree	O
of	O
harmonisation	O
between	O
Europe	O
's	O
emerging	O
videotex	B-Operating_System
systems	O
,	O
which	O
had	O
been	O
diverging	O
along	O
national	O
lines	O
.	O
</s>
<s>
It	O
recognised	O
four	O
baseline	O
profiles	O
(	O
with	O
conformance	O
criteria	O
set	O
out	O
in	O
Annex	O
C	O
)	O
based	O
on	O
existing	O
videotex	B-Operating_System
services	O
:	O
</s>
<s>
National	O
videotex	B-Operating_System
services	O
were	O
encouraged	O
to	O
either	O
follow	O
one	O
of	O
the	O
existing	O
four	O
basic	O
profiles	O
;	O
or	O
if	O
they	O
extended	O
them	O
,	O
to	O
do	O
so	O
in	O
ways	O
compatible	O
with	O
the	O
harmonised	O
enhanced	O
specification	O
.	O
</s>
<s>
The	O
ETSI	O
version	O
of	O
the	O
standard	O
is	O
designated	O
ETS	B-Device
300	I-Device
072	I-Device
.	O
</s>
