Re: timeless atom

[Erik Wilde <dret@xxxxxxxxxxxx>]

thanks for the link to sle! after looking at it, not only is it not what 
i want (because it is client-side only), it also looks pretty badly 
underspecified in the key area (data types), which is surprising for 
such a tiny specification.

http://dret.typepad.com/dretblog/2007/12/simple-sle.html

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Simple SLE

as one response to my inquiry about timeless Atom, i have been pointed 
to microsoft's Simple List Extensions (SLE), which are designed as 
extensions to existing feed formats, such as RSS 2.0 and Atom, to make 
exposing ordered lists of items easier and more accessible to users.

this is a pure client-side solution and basically enables feed readers 
to sort feed entries based on different criteria. essentially, it is the 
same thing (only worse) as the atom ranking extensions i mentioned in 
the atom landscape overview.

looking at the SLE specification is interesting, because it is so bad. 
for example, the extensions permit the data types date, text, and 
number, but fail to say what they mean, and what kind of values a server 
must produce and a client may expect. calling such an incomplete sketch 
a specification really is a misuse of the term.

apart from that, both SLE and the atom ranking extensions are not really 
what i am looking for, because they do not allow any kind of querying, 
they just allow secondary sort keys to be specified, while the primary 
sort key still is time and the feed will be composed based on a 
time-based query into a collection's entries.