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RE: expand-property report, exapnding version-controlled-binding- set ?

From: Zivkov, Sasa <sasa.zivkov@sap.com>
Date: Wed, 31 Jul 2002 18:49:44 +0200
Message-ID: <816D93CCC927D31188570008C75D1DE110FD8752@dbwdfx1a.wdf.sap-ag.de>
To: ietf-dav-versioning@w3.org

> -----Original Message-----
> From: Reschke, Julian 
> Sent: Mittwoch, 31. Juli 2002 18:25
> To: Zivkov, Sasa; ietf-dav-versioning@w3.org
> Subject: RE: expand-property report, exapnding
> version-controlled-binding- set ?
> 
> 
> > > > Hi,
> > > >
> > > > The rfc3253 says:
> > > >
> > > >    Many property values are defined as a DAV:href, or a set
> > of DAV:href
> > > >    elements.  The DAV:expand-property report provides a mechanism for
> > > >    retrieving in one request the properties from the resources
> > > >    identified by those DAV:href elements.  ...
> > > >
> > > > Since DAV:version-controlled-binding-set is list of
> > > > (binding-name, version-history)
> > > > elements and not list of hrefs it seems to me that it is not
> > possible to
> > > > further expand this property.  For example the next request tries
> > > > to expand
> > > > version-controlled-binding-set:
> > > >
> > > >      REPORT /foo.html HTTP/1.1
> > > >      Host: www.webdav.org
> > > >      Content-Type: text/xml; charset="utf-8"
> > > >      Content-Length: xxxx
> > > >
> > > >      <?xml version="1.0" encoding="utf-8" ?>
> > > >      <D:expand-property xmlns:D="DAV:">
> > > >        <D:property name="version-controlled-binding-set">
> > > >          <D:property name="version-history">
> > > >            <D:property name="creator-displayname"/>
> > > >          </D:property>
> > > >        </D:property>
> > > >      </D:expand-property>
> > > >
> > > > But, since members of version-controlled-binding-set are not
> > > > href's (and they
> > > > are not resources) we can not further expand this property.
> > > >
> > > > Is this correct ?
> > >
> > > The embedded version-history element has the href-format, so
> > you should be
> > > able to do:
> > >
> > >      <?xml version="1.0" encoding="utf-8" ?>
> > >      <D:expand-property xmlns:D="DAV:">
> > >        <D:property name="version-controlled-binding-set">
> > >          <D:property name="creator-displayname"/>
> > >        </D:property>
> > >      </D:expand-property>
> > >
> > > (if what you're after is the DAV:creator-displayname of the version
> > > history).
> >
> > version-controlled-binding-set members are version-controlled-binding's
> > and version-controlled-binding is even not a resource so we can not
> > ask it for its properties (creator-displayname is this case).
> 
> As you said, version-controlled-bindings consists of binding-name
> version-history. version-history has href format, so you *can* expand that
> if you want to.

An example:
<version-controlled-binding-set>

   <version-controlled-binding>
      <binding-name>abc</binding-name>
      <version-history><href>/vh11</href></version-history>
   </version-controlled-binding>

   <version-controlled-binding>
      <binding-name>def</binding-name>
      <version-history><href>/vh12</href></version-history>
   </version-controlled-binding>
   ...
</version-controlled-binding-set>

So the version-history is at the second level after version-controlled-binding-set.
And the members of version-controlled-binding-set are not DAV:href's but elements
that contain href's.
Again from rfc3253:
   Many property values are defined as a DAV:href, or a set of DAV:href
   elements.  The DAV:expand-property report provides a mechanism for
   retrieving in one request the properties from the resources
   identified by those DAV:href elements.  ...

> 
> > Which part of the rfc3253 says that we should use version-history part
> > of a version-controlled-binding element for property expansion ?
> 
> None. It depends on whose property you want. You can't get the properties of
> the binding name (it's not a resource), but you *can* get the properties of
> the version history.
> 
> > What if version-controlled-binding element (or any other) would have
> > two href members, which one should be used for expand-property report ?
> 
> Both.
Received on Wednesday, 31 July 2002 12:50:21 GMT

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