RE: Track "id" format?

Also, in the wiki there's a whole column for the "id" attribute in each table. I think we should just say: All MPEG-TS tracks use PID, all Matroska / WebM tracks use TrackUID.
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From: Brendan Long [B.Long@cablelabs.com]
Sent: Monday, November 11, 2013 11:37 AM
To: public-inbandtracks@w3.org
Subject: Track "id" format?

I'm trying to implement the "id" attribute for in-band tracks<https://bugzilla.gnome.org/show_bug.cgi?id=711522>, and I'm wondering how IDs should be formatted.

For example, MPEG-TS's PID<https://en.wikipedia.org/wiki/MPEG_transport_stream#PID> is 13 bits, but I'm not sure if there's a standard non-binary way of representing it. Matroska / WebM have an arbitrary sized unsigned integer TrackUID<http://matroska.org/technical/specs/index.html#TrackUID>. Should we represent them as decimal, hexidecimal, or something else?

I assume we should use whatever formatting is common for each format, but I don't know what this is. Is there a good way to decide on this, or even better, an already-existing standard?