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RSS in the Wild

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In the real world, RSS doesn’t conform to a single specified set of elements and attributes: instead there are increasing numbers of extensions and variations on the format.

Channel Elements

Standard Elements

Most Common

  • title
  • description
  • link

Others

  • pubDate (ex: Sat, 11 Feb 2006 11:04:58 -0800)
  • lastBuildDate (ex: Sat, 11 Feb 2006 11:04:58 -0800)
  • category
  • generator
  • image
    • url
    • title
    • link
  • language
  • webMaster
  • copyright
  • docs
  • ttl
  • managingEditor

Extensions

RDF Syndication Module

  • sy:updatePeriod ( ‘hourly’ | ‘daily’ | ‘weekly’ | ‘monthly’ | ‘yearly’ ) (indicates update period)
  • sy:updateFrequency (ex: “1”) (indicates frequency within the updatePeriod)
  • sy:updateBase (ex: “2000-01-01T12:00+00:00”) (yyyy-mm-ddThh:mm)

Creative Commons

  • cc:license [rdf:resource]

Admin

  • admin:generatorAgent rdf:resource=”http://homepage.com” (indicates homepage/source of rss feed)

Technorati API

  • tapi:inboundblogs
  • tapi:inboundlinks

iTunes RSS Tags

  • itunes:subtitle
  • itunes:author
  • itunes:summary
  • itunes:owner
    • itunes:name
    • itunes:email
  • itunes:image [href]
  • itunes:category [text]
  • itunes:block
  • itunes:explicit

Item Elements

Standard Elements

Most Common

  • title
  • description
  • link

Others

  • category [domain]
  • guid [isPermalink]
  • source [url]
  • pubDate (ex: ‘Sun, 15 May 2005 22:41:44 GMT’)
  • enclosure url [type]
  • comments

Extensions

Dublincore

  • dc:subject – space separated categories (del.icio.us, Macslash)
  • dc:date – ISO-something something. (Ex: “2006-02-10T08:00:00-08:00”)
  • dc:publisher
  • dc:creator

RSS Module Taxonomy

  • taxo:topics (seen in del.icio.us)
    • rdf:Bag
      • rdf:li [resource]

Media RSS (seen in Flickr)

  • media:content url height
  • media:title
  • media:text [type]
  • media:thumbnail url [width]
  • media:credit [role]
  • media:category [scheme] (space separated list of tags)

The Well-Formed Web

  • wfw:comment (commentURL for Comment API)
  • wfw:commentRss (URI of the RSS feed for comments on the item)

iTunes RSS Tags

  • itunes:author
  • itunes:subtitle
  • itunes:summary
  • itunes:duration (ex: “7:04”) (minutes:hours)
  • itunes:keywords (comma separated listed of categories)
  • itunes:block
  • itunes:explicit

Technorati API

  • tapi:linkcreated (ex “2006-02-13 13:08:15”)
  • tapi:inboundblogs
  • tapi:inboundlinks
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