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Re: Comments on Action:draft-brown-versioning-link-relations-03

From: Julian Reschke <julian.reschke@gmx.de>
Date: Tue, 01 Dec 2009 15:07:52 +0100
Message-ID: <4B152338.10602@gmx.de>
To: Jan Algermissen <algermissen1971@mac.com>
CC: Geoffrey M Clemm <geoffrey.clemm@us.ibm.com>, Atom-syntax Syntax' <atom-syntax@imc.org>, WebDAV <w3c-dist-auth@w3.org>, w3c-dist-auth-request@w3.org
Jan Algermissen wrote:
> ...
> Hmm, I think so. The definition in a sense implies that the version is 
> created as a result of the modification. Which is IMHO *never* the case 
> for working copies.
> 
> Surely the draft must define 'working copy'. What is the nature of a 
> working copy? What is its true nature? I think: being *used* for 
> creating new versions. So, what about:
> 
>>>> "A "working copy" is a resource at a server-defined URL that can be 
>>>> *used* to create a new version of a versioned resource."
> ...

So, substituting "modified" by "used". I'm ok with that.

> and remove checkout/checkin completely. ('use' instead of 'modify' 
> sounds less like "The modification cause the versioning" (which it never 
> does by nature of a working copy (IMHO - s.a.))
> 
> If the draft wanted to define it, then it woud be something like:
> 
> checkout: an operation on a resource that creates a working copy
> checkin: an operation on a working copy that creates a new version of 
> its corresponding versioned resource.

The issue here is that in some systems, checkout will not create a new 
resource, just flip a bit on the versioned resource.

Also, (I think) there are systems where checking in does not create a 
new version, but flips a bit on the working resource *making* it a 
version (at the same URL).

Thus, defining this would need to be defined in a more generic way. My 
attempt:

"Checkout: an operation on a versioned resource that creates a working 
copy, or changes the versioned resource to be a working-copy as well 
("in-place versioning").

Checkin: an operation on a working copy that creates a new version of
its corresponding versioned resource.

Note: the operations for putting a resource under version control, and 
for checking in and checking out depend on the protocol in use and are 
beyond the scope of this document; see [CMIS], [RFC3253] and [JSR-283] 
for details)."

Best regards, Julian
Received on Tuesday, 1 December 2009 14:08:35 GMT

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