Tom; House numbers will be useful to identify assets in broadcast plants for some time. The only way you can find SMPTE 2021 right now is to join SMPTE and the S22 subcommittee that's developing it. It will probably be published by the time of NAB, but that might be optimistic. (I remember the chairman saying we had to get the document through the committee before NAB 2006.) SMPTE membership costs $135 a year. I just read a good article in the Motion Imaging journal about how the Korean Broadcasting System distributes essence and metadata in their plant. John Willkie -----Mensaje original----- De: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] En nombre de Tom Barry Enviado el: Friday, December 21, 2007 10:06 AM Para: opendtv@xxxxxxxxxxxxx Asunto: [opendtv] Re: Will broadcasters use ISAN content_ID numbers? Thanks John, I wasn't really rooting for either a yes or no answer and it won't be up to me what gets used. But I'm trying to find out what the broadcasters intentions might be for various types of materials. I'll try to hunt up a copy of SMPTE 2021/BXF. - Tom ---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways: - Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line.