Hi Erik, On Thu, Apr 28, 2011 at 05:31:10PM -0700, Erik Wilde wrote: > > hello. > > on http://dret.typepad.com/dretblog/2011/04/atom-content-negotiation.html > i have posted some thoughts on whether there should eb a way how to > differentiate between "feed variants", so that publishers could link > the HTML feed to the XML feed. any feedback would be very welcome, > both encouraging and critical. commenting on the blog might be > better visible, and i will take the freedom to link back from the > blog to the mailing archive if there are interesting follow-up > mails, unless you don't want me to do so.
Why not just use <atom:link rel='alternate' href='...'/> at both the feed and entry levels? In our data repository systems (based on AtomPub), both collections and collection members are content negotiable resources. I.e., you can retrieve an Atom, HTML or JSON representation, by specifying different preferences in the Accept request header. In addition to this content negotiation at the collection or member URI, each variant representation also has a URI, and links are provided in entry and feed representations to all variant representations via the 'alternate' link relation. E.g., GET /foo Host: example.org Accept: application/atom+xml 200 OK Content-Type: application/atom+xml;type=feed Content-Location: http://example.org/foo?format=atom Vary: Accept <atom:feed xmlns:atom="http://www.w3.org/2005/Atom";> <atom:link rel="self" href="http://example.org/foo"/> <atom:link rel="alternate" type="text/html" href="http://example.org/foo?format=html"/> <atom:link rel="alternate" type="application/json" href="http://example.org/foo?format=json"/> ... <atom:entry> <atom:link rel="edit" href="http://example.org/foo/bar"/> <atom:link rel="alternate" type="text/html" href="http://example.org/foo/bar?format=html"/> <atom:link rel="alternate" type="application/json" href="http://example.org/foo/bar?format=json"/> ... </atom:entry> </atom:feed> FWIW, this is implemented using a generic content negotiation plugin for AtomBeat [1], sorry no documentation as yet. Cheers, Alistair [1] http://code.google.com/p/atombeat/wiki/ReleaseNotes#configurable_conneg_plugin > > thanks and kind regards, > > dret. > > -- > erik wilde | mailto:[email protected] - tel:+1-510-6432253 | > | UC Berkeley - School of Information (ISchool) | > | http://dret.net/netdret http://twitter.com/dret | > -- Alistair Miles Head of Epidemiological Informatics Centre for Genomics and Global Health <http://cggh.org> The Wellcome Trust Centre for Human Genetics Roosevelt Drive Oxford OX3 7BN United Kingdom Web: http://purl.org/net/aliman Email: [email protected] Tel: +44 (0)1865 287669
