<s>
The	O
Service	B-Device
List	I-Device
Registry	I-Device
(	O
SLR	O
)	O
provides	O
an	O
online	O
directory	O
of	O
audiovisual	O
services	O
,	O
based	O
on	O
open	O
standards	O
for	O
Digital	B-Application
Video	I-Application
Broadcasting	I-Application
.	O
</s>
<s>
The	O
Service	B-Device
List	I-Device
Registry	I-Device
enables	O
any	O
compatible	O
client	O
device	O
or	O
application	O
to	O
query	O
a	O
distributed	O
online	O
database	O
to	O
retrieve	O
lists	O
of	O
relevant	O
media	O
services	O
and	O
obtain	O
technical	O
details	O
of	O
how	O
to	O
access	O
them	O
over	O
various	O
delivery	O
networks	O
.	O
</s>
<s>
The	O
federated	O
online	O
directory	O
is	O
based	O
on	O
the	O
open	O
DVB-I	O
standard	O
for	O
Service	O
Discovery	O
and	O
Programme	O
Metadata	O
,	O
developed	O
by	O
the	O
European	O
Broadcasting	O
Union	O
and	O
the	O
DVB	B-Application
Project	I-Application
based	O
in	O
Geneva	O
.	O
</s>
<s>
The	O
purpose	O
of	O
the	O
Service	B-Device
List	I-Device
Registry	I-Device
is	O
to	O
enable	O
"	O
Simple	O
Service	O
Selection	O
on	O
any	O
screen	O
"	O
.	O
</s>
<s>
Compatible	O
devices	O
and	O
applications	O
can	O
use	O
the	O
Service	B-Device
List	I-Device
Registry	I-Device
to	O
discover	O
and	O
access	O
audio	O
and	O
video	O
services	O
from	O
various	O
sources	O
,	O
including	O
fixed	O
and	O
wireless	O
internet	O
connections	O
and	O
traditional	O
cable	O
,	O
satellite	O
and	O
terrestrial	O
transmissions	O
.	O
</s>
<s>
The	O
Service	B-Device
List	I-Device
Registry	I-Device
platform	O
was	O
developed	O
to	O
support	O
DVB-I	O
,	O
a	O
Digital	O
Video	O
specification	O
developed	O
by	O
the	O
DVB	B-Application
Project	I-Application
.	O
</s>
<s>
The	O
DVB	B-Application
established	O
a	O
group	O
to	O
begin	O
the	O
definition	O
of	O
DVB-I	O
in	O
October	O
2017	O
.	O
</s>
<s>
Work	O
on	O
the	O
commercial	O
requirements	O
for	O
DVB-I	O
began	O
in	O
January	O
2018	O
and	O
the	O
terms	O
of	O
reference	O
were	O
agreed	O
in	O
March	O
2018	O
.	O
</s>
<s>
The	O
specification	O
was	O
approved	O
by	O
the	O
DVB	B-Application
in	O
November	O
2019	O
.	O
</s>
<s>
It	O
was	O
first	O
published	O
as	O
a	O
DVB	B-Application
BlueBook	O
in	O
June	O
2020	O
and	O
as	O
an	O
ETSI	O
standard	O
in	O
November	O
2020	O
.	O
</s>
<s>
The	O
DVB-I	O
standard	O
defines	O
the	O
technical	O
function	O
of	O
a	O
Service	B-Device
List	I-Device
Registry	I-Device
or	O
SLR	O
as	O
an	O
HTTP	O
endpoint	O
available	O
at	O
a	O
known	O
URL	O
that	O
,	O
if	O
queried	O
,	O
can	O
return	O
a	O
list	O
of	O
Service	O
List	O
Entry	O
Points	O
.	O
</s>
<s>
In	O
June	O
2021	O
,	O
the	O
DVB	B-Application
Project	I-Application
commissioned	O
a	O
reference	O
implementation	O
of	O
a	O
skeleton	O
DVB-I	O
Central	O
Service	B-Device
List	I-Device
Registry	I-Device
as	O
a	O
proof	O
of	O
concept	O
for	O
verification	O
and	O
validation	O
of	O
the	O
specification	O
.	O
</s>
<s>
Service	B-Device
List	I-Device
Registry	I-Device
Limited	O
was	O
incorporated	O
as	O
a	O
separate	O
entity	O
in	O
April	O
2022	O
to	O
provide	O
the	O
service	O
discovery	O
platform	O
.	O
</s>
<s>
The	O
Service	B-Device
List	I-Device
Registry	I-Device
launched	O
at	O
DVB	B-Application
World	O
in	O
Brussels	O
on	O
18	O
May	O
2022	O
.	O
</s>
<s>
Three	O
months	O
after	O
launch	O
,	O
a	O
pilot	O
programme	O
was	O
announced	O
for	O
participants	O
to	O
join	O
the	O
Service	B-Device
List	I-Device
Registry	I-Device
.	O
</s>
<s>
The	O
first	O
public	O
demonstration	O
of	O
the	O
Service	B-Device
List	I-Device
Registry	I-Device
platform	O
was	O
provided	O
at	O
the	O
international	O
IBC	O
Show	O
trade	O
convention	O
in	O
Amsterdam	O
on	O
9-12	O
September	O
2022	O
.	O
</s>
<s>
As	O
specified	O
in	O
the	O
open	O
DVB-I	O
standard	O
,	O
a	O
compatible	O
device	O
,	O
display	O
or	O
application	O
can	O
make	O
an	O
online	O
query	O
request	O
to	O
the	O
Service	B-Device
List	I-Device
Registry	I-Device
server	O
,	O
specifying	O
parameters	O
such	O
as	O
language	O
,	O
country	O
or	O
technical	O
capabilities	O
,	O
and	O
in	O
response	O
will	O
receive	O
a	O
list	O
of	O
relevant	O
audiovisual	O
service	O
offerings	O
.	O
</s>
