Re: New Version Notification for draft-divilly-atom-hierarchy-02

["Nikunj R. Mehta" <nikunj.mehta@xxxxxxxxxx>]

On Jun 10, 2009, at 10:55 AM, James M Snell wrote:

> Thank you for the changes. Another issue that needs to be looked at  
> (which existing in the previous version of the draft as well)

This issue did not exist in the previous draft since only one link  
with @rel value down and @type application/atom+xml was possible.

> is how a processor can reconstruct the logical set of children for  
> an entry... that is, for instance, if the set of child entries  
> contains multiple atom:entry elements with the same atom:id value,  
> are those viewed as separate children or is only the entry with the  
> most recent atom:updated value included in the set of children?

We have two choices - either constrain cardinality and obtain an  
unambiguous logical set of children or remove the cardinality  
constraint and leave it to applications to interpret multiple sets or  
subsets. I don;t see how we can get a third option. BTW, the threading  
extension uses the second approach and §2.2 as well as §2.3 of  
hierarchy I-D explain what an Atom processor does with multiple  
occurrences of the down and up link, respectively.

> Further, if multiple "down" links are specified, each pointing to  
> separate Atom feeds with separate entries with distinct atom:id  
> values, is that to be viewed as two separate child collections or a  
> single logical combined collection? I would recommend the latter.

As I explain above, this choice is infeasible. How is one to reconcile  
an HTML linked resource with an entry with a feed and an image all  
through @rel=down? I would be interested in learning of a proposal to  
handle this kind of a situation.

> Nikunj R. Mehta wrote:
> > Based on feedback, I have simplified the I-D to:
> > In-line extensions moved to draft-mehta-atom-inline
> >      Removed down-tree and up-tree relations
> >      Removed cardinality restrictions on up and down links
> >
> > HTML: http://tools.ietf.org/html/draft-divilly-atom-hierarchy-02
> > Text: http://tools.ietf.org/id/draft-divilly-atom-hierarchy-02.txt <http://tools.ietf.org/id/draft-mehta-atom-inline-00.txt 
> > >
> > Diff: http://tools.ietf.org/rfcdiff?url2=draft-divilly-atom-hierarchy-02.txt
> >
> > I am also tracking open issues about this I-D publicly at http://code.google.com/p/atom-ext/issues/list 
> > . The source for this I-D is also available, if you are interested.
> >
> > Looking forward to comments on the I-D.
> >
> > Nikunj
> > http://o-micron.blogspot.com <http://o-micron.blogspot.com/>
> >
> >
> > Begin forwarded message:
> >
> > > *From: *IETF I-D Submission Tool <idsubmission@xxxxxxxx <mailto:idsubmission@xxxxxxxx 
> > > >>
> > > *Date: *June 9, 2009 5:33:57 PM PDT
> > > *To: *nikunj.mehta@xxxxxxxxxx <mailto:nikunj.mehta@xxxxxxxxxx>
> > > *Cc: *colm.divilly@xxxxxxxxxx <mailto:colm.divilly@xxxxxxxxxx>
> > > *Subject: **New Version Notification for draft-divilly-atom- 
> > > hierarchy-02 *
> > >
> > >
> > > A new version of I-D, draft-divilly-atom-hierarchy-02.txt has been  
> > > successfuly submitted by Nikunj Mehta and posted to the IETF  
> > > repository.
> > >
> > > Filename: draft-divilly-atom-hierarchy
> > > Revision: 02
> > > Title: Hierarchy Relations for Atom
> > > Creation_date: 2009-06-09
> > > WG ID: Independent Submission
> > > Number_of_pages: 7
> > >
> > > Abstract:
> > > This specification defines link relations for hierarchical  
> > > navigation
> > > among Atom feeds and entries.Editorial Note
> > >
> > > To provide feedback on this Internet-Draft, join the atom-syntax
> > > mailing list (http://www.imc.org/atom-syntax/) [1].
> > >
> > >
> > >
> > > The IETF Secretariat.