Re: Version identifier in URL

Daniel W. Connolly (
Thu, 30 May 1996 08:58:57 -0400

In message <>, Larry Masinter write
>Wait, I didn't see that anyone was proposing to "standardize the
>syntax of version identifiers across all servers".

I did:

Date: Tue, 28 May 1996 22:08:19 -0700
 From: Christopher Seiwald <>
Message-Id: <>
Subject: Re: Version identifier in URL


We need to stick to our guns: make a simple version extention to URLs
and make them standard.

Christopher Seiwald     P3 Software             f-f-f-fast SCM          1-510-865-8720

>> The point is: you can't tell the relationship between address A1
>> and address A2 just by looking at their syntax: you need explicit
>> information that says one is a version of the other. The Resource
>> element is one such syntax.
>Separate out the problem of
>  a) construct a URL for a previous version of a resource
>     given the current version of a resource and information
>     about the server's versioning system
>  b) determining from two URLs what their version relationship
>     might be.
>I think it's reasonable to use URL-decoration for (a) and not for (b).
>Maybe it's OK if the only way you can accomplish (b) is to retrieve
>attributes of the actual resources, and not their URLs.

Fair enough. ?version=xxx seems reasonable for (a)