Is there any standard effort try to standardize Time Zone ID? I am not talking about the Time Zone which refer to a particular time (that could be done by GMT offset or addressed by ISO 8601) itself, but rather talking about an id refer to a particular time zone/ day light saving time rule.
I know the de factor standard around is the one in "ftp://elsie.nci.nih.gov/pub/tz" . Probably people also use the timezone value get back from Java a lot. I think a standard (maybe just adopt the one "ftp://elsie.nci.nih.gov/pub/tz" and cleary specify it in RFC) for Timezone ID is important for the future common locale data repository as well as web services i18n. I know this is a little bit off-topic for Unicode, just like the one about locale. Maybe I should move this to w3c i18n mailling list.