Entry IDs for Atom feeds generated from Bazaar branches

[Robert Collins]

On Thu, 2007-03-29 at 10:28 -0500, John Arbash Meinel wrote:
> Aaron Bentley wrote:
> > James Henstridge wrote:
> >> It would be nice to have a single entry ID format that we can
> >> recommend that such tools produce.  After some discussions with
> >> Robert, the format we thought might be worth suggesting is:
> >>    http://bazaar-vcs.org/RevisionId#$REVISION_ID
> > 
> > Why not just use a tag uri?
> > 
> > http://www.taguri.org/
> > 
> > Aaron
> 
> Wouldn't that be the same as "tag:revision at id-200507207-aboetuhanoeuh" ?

It should be formatted (assuming we trust our datestamps and committer
fields):
tag:committer,commitdate:entropy
e.g.
tag:revision at id,2005-02-20:aboetuhanoeuh

As only some revision*ids* have all these fields, we can't depend on
them to generate a tag: unless we read the revision data (bad).

> I guess I don't know what makes "tag:foo at org,2001:Taiko" a valid URI,
> but not "bzr-revid:$revision_id"

tag: is IANA registered, there is no psuedo scheme in use and its
intended for anyone to use - which is good. But we can't use it from
just our revisionids.

Announcing commits in our namespace though no safer, can be done without
using a different algorithm than tag: does, and wont require reading the
commit to gather metadata.

-Rob


-- 
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