Re: paging in editor's draft

If we allow inserts in the middle of a collection then even next/prev can change out from under you.
All the best, Ashok
On 10/31/2013 2:54 PM, John Arwe wrote:
> > John, is it that much of a performance benefit not make all pages
> > doubly-linked?
>
> I would not think next/prev is a big deal.
>
> Subtler problem is the use of "last", which I think has semantics likely to surprise people.  I "hear" a finality about last, but in really it's a moving target in many cases.  "Last" was only "last" when the server sent the response; if you retrieve the same "last page" URL again, it might not be "last" any longer.  Flip the page order, and first has the same problem.  Familiar enough behavior to RESTifarians [waves gratefully to ErikW], but I've already seen my share of devs who still come at things with a more traditional (closed) mindset.
>
> I do think it somewhat likely that servers are likely to have some "natural order" that they expect clients to traverse in, probably specific to the resource and/or its type; to some degree this aligns with the whole "first...last" HTTP link header language that originated with Feed Paging and Archiving (RFC 5005).  I'm not so sure that in *all* those cases the opposite order is just as easy to populate, but I don't have any handy examples where I know it's hard (nor honestly have I had time to give it serious thought).  5005 is much more open at this point than LDP, to the degree we consider that precedent relevant: it requires at least one of the links, and (lower case) should's "as many as are practical and applicable".
>
> I do note (looking at RFC 5005) that it defined a "complete" feed [waves again to ErikW], since the concept of completeness arose in the 200/209/303 discussion.  [spoiler alert] Completeness there depends on a single document scope.
>
> [5005 paged feeds] http://tools.ietf.org/html/rfc5005#section-3  is all of 1.5 pages, so not scary to actually read.
>
> Best Regards, John
>
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