Re: Fwd: New Version Notification for draft-divilly-atom-hierarchy-01

[James M Snell]

Hadrien Gardeur wrote:
James,

    Hmmm.... I know we've discussed this, but after thinking about it
    more and looking through the examples, I'm becoming increasingly
    less convinced that we need a distinction between "down" and
    "down-tree".  One should simply assume that "down" could point to
    a child entry or child feed and that those children could
    potentially also be parents. Yes, that possibly increases the
    processing compexity but I think it simplifies the model overall.


I agree, and I've implemented hierarchy using strictly l...@rel="down" 
instead of "down-tree" for the same reason.
  

    I think we can address this by eliminating the restriction that
    "down" and "up" must always point to Atom feed documents and by
    changing the cardinality rules for those links. That restriction,
    I think, is arbitrary and unnecessary


I agree about the type: it could be useful to use a "down" link on 
something else than a feed.
Not sure about cardinality though, moving from a tree model to a graph 
model really make things more complex (more flexible and powerful too).
Yes, there is the potential for making things a lot more complex but the 
definition of the "down" and "up" links shouldn't rule it out. Whether 
or not to use a tree or graph should be up to the application. However, 
we should be able to use the same link relations for either model.
 

    Unlike any of the other methods discussed, this approach would
    allow clients that don't understand the hierarchy model to still
    understand that there is some kind of link relationship with each
    of the individual child resources and eliminates the need to
    include the extraneous atom:feed metadata.

    Note that this is the same basic approach taken by my comment
    thread extension (in-reply-to).


The hierarchy I-D used to have ah:count to indicate the number of 
entries in the child feed. Now that Nikunj removed ah:count from the 
draft, do you believe that thr:count from your Atom threading 
extension could be used on l...@type="application/atom+xml;type=feed" 
for hierarchy ?

Potentially. I don't see why it couldn't be used for that.

- James
Hadrien