Re: What is a Version?

On Thu, Mar 12, 2026 at 06:11:55PM +0100, Julian Reschke wrote:
> [...]

I'm asking how to get a URI for the version _alone_, not the versioned
resource.  If we're talking about a VCS application we'd be talking
about obtaining a URI for a "commit" that might involve many resources.

Given:

  GET /some/resource

  200 Ok
  Version: 12345

find a URI for a commit named 12345 that affected /some/resource and
possibly others.

> > > In practice, you can't define new fields that support conditional requests
> > > (unless you control both ends and all intermediaries). For conditional
> > > reads, that would be harmless (no optimizations), for range requests and
> > > write conflict prevention it would be a major problem.
> > 
> > You could look before jumping.
> 
> Opt-in? How does this work with caches?

Ah, good point.  We'd need a way to discover cache functionality.

> Having a URI for "the representation of the resource when it (the
> representation) had this etag" could be useful when looking at the history
> of a resource. FWIW, we have a response field for that in HTTP.

What header is that?  Location:?

Nico
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Received on Thursday, 12 March 2026 18:01:25 UTC