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RE: DAV:checked-out property of a working-resource

From: Geoffrey M Clemm <geoffrey.clemm@us.ibm.com>
Date: Wed, 15 Sep 2004 09:38:20 -0400
To: "'ietf-dav-versioning@w3.org'" <ietf-dav-versioning@w3.org>
Message-ID: <OF5FB450B6.5D69D393-ON85256F10.0049656C-85256F10.004AEC61@us.ibm.com>
OK, now I get it.  The DAV:create-working-resource post-condition
needs to be split into two post-conditions, i.e. one that applies
when "the method is applied to a version" (most of the text),
and another that applies when "the request-URL identified a version"
(just the last statement about the DAV:auto-update property).

I'll add this to the RFC-3253 errata list.

Thanks for catching that!

Cheers,
Geoff 

Girish wrote on 09/15/2004 08:45:14 AM:
> The ambiguity comes in if the two post-conditions are read in 
> isolation.  The fact that they define different semantics for the 
> DAV:auto-update property led me to believe that they may also define
> different semantics for the other properties like DAV:checked-out.
> 
> So, in reality:
> 
> DAV:create-working-resource-from-checked-in-version (VCR URL, DAV:
> apply-to-version)
>    working-resource <-- DAV:create-working-resource(VCR::DAV:checked-in)
>    working-resource::DAV:auto-update <-- VCR URL
> 
> Probably some redundancy would have made it clearer.
> 
> Regards,
> Girish
> 
> ________________________________
> 
> From: ietf-dav-versioning-request@w3.org [mailto:ietf-dav-
> versioning-request@w3.org] On Behalf Of Geoffrey M Clemm
> Sent: Wednesday, September 15, 2004 1:51 PM
> To: 'ietf-dav-versioning@w3.org'
> Subject: Re: DAV:checked-out property of a working-resource
> 
> 
> 
> 
>    Girish wrote on 09/15/2004 05:34:16 AM:
>    > What should be the DAV:checked-out property of a working resource, 
>    > when the working resource was created due to a CHECKOUT on a 
>    > version-controlled-resource with DAV:apply-to-version?  Should it 
be
>    > equal to the DAV:checked-in property of the version-controlled-
>    > resource at the time the CHECKOUT was done?
> 
>    The semantics of CHECKOUT to create a working resource is defined 
>    in section 9.3 "CHECKOUT Method (applied to a version)". 
> 
>    Postcondition DAV:create-working-resource-from-checked-in-version 
states: 
>          If the 
>          request-URL identified a version-controlled resource, and 
>          DAV:apply-to-version is specified in the request body, the 
>          CHECKOUT is applied to the DAV:checked-in version of the 
version- 
>          controlled resource, and not the version-controlled resource 
>          itself. 
> 
>    Postcondition DAV:create-working-resource states: 
>          The DAV:checked-out property of the new 
>          working resource MUST identify the version that was checked 
out. 
> 
>    So since the CHECKOUT is applied to the DAV:checked-in version and 
the 
>    DAV:checked-out property identifies the version that was checked out, 

>    then yes, the DAV:checked-out property of the new working resource 
>    identifies the DAV:checked-in version. 
> 
>    Is there something in the spec that led you to believe otherwise? 
> 
>    Cheers, 
>    Geoff 
> 
> 
> 
> 
Received on Wednesday, 15 September 2004 14:16:01 GMT

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