RSS

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RSS Feeds

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What is RSS?

• RSS is a text-based format, a type of XML.
• You should know that only because often RSS files
  are often labeled as XML.

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What is RSS?

• RSS version 1.0 is also RDF (whatever), which,
  again, is important only because an RSS file may
  be labeled as RDF.
• RSS files (which are also called RSS feeds or
  channels) simply contain a list of items.

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What is RSS?

• Usually, each item contains a title, summary, and
  a link to a URL (e.g. a web page).
• The most common use for RSS files is for news and
  other reverse-chronologically ordered websites
  like blogs.

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What is RSS?

• When a website has an RSS feed, it is said to be
  syndicated.
• RSS files do not have a common file extension,
  although they frequently end in one of .xml,
  .rss, or .rdf

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What is RSS?

• If you are interested in creating RSS feeds, see
  this RSS Workshop, or Atom for Publishers for
  Atom.
• If you are interested in creating an RSS or Atom
  reader, see the Aggregators Yahoo! group.

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Glossary

• RSS
• Really Simple Syndication
• Rich Site Summary
• RDF Site Summary
• RSS file
• RSS feed
• RSS channel
• feed
• channel

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Glossary

• XML
• eXtensible Markup Language
• the format RSS is written in
• important only because RSS may be labeled as XML
  
• RDF
• Resource Discovery Framework
• the format of RSS version 1.0
• important only because RSS may be labeled as RDF

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Glossary

• blog
• weblog
• log on the web
• a journal-type website, many of which produce
  RSS feeds

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Glossary

• RSS reader
• news reader
• RSS aggregator
• a program that can read RSS files

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What Can I do with RSS?

• displaying headlines on other websites
• search engines
• aggregating RSS feeds from multiple websites

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Displaying Headlines on Other Websites

• Quite a few websites use RSS to display headlines
  from other websites, as it provides additional
  content to their readers.
• Below is displayed the last seven front-page news
  headlines from the BBC. The BBC has 68 RSS feeds
  available.

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Search Engines

• RSS-based search engines can index individual
  items rather than pages which may contain many
  items.
• There are several good general-purpose RSS-based
  search engines around today they are available
  on Fagan Finder on the Weblogs, Journals, and RSS
  page.

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RSS Aggregators
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Why Use an RSS Aggregator?

• For anyone that reads a half dozen or more pages
  that have RSS feeds, an aggregator is a
  necessity.
• RSS aggregators are set up to periodically check
  for new items in the feeds you are subscibed to,
  commonly once every hour.

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Why Use an RSS Aggregator?

• This saves a tremendous amount of time. Or
  conversely, you can read many more feeds in the
  same ammont of time.
• Many people read several hundred feeds. That just
  wouldnt be feasible without an RSS aggregator.

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Why Use an RSS Aggregator?

• Additionally, you avoid all the non-new
  information on a web page, including the ads,
  menus, etc.

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Subscribing to a Feed

• There is no agreed-upon standard for how to
  subscribe to an RSS feed.
• There are roughly two ways to subscribe.
• One is to enter the URL of the RSS feed into your
  aggregator.
• The other is to follow a subscribe link from a
  web page

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Finding the RSS Feed for a Website

• The websites you already read may have an RSS
  feed. So you want to find it.
• Go to Feedster tool and enter in a website. It
  will return the feed for you.

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Finding the RSS Feed for a Website

• The most common is an XML icon like this ,
  but there are a number of variations on label
  (RSS, RSS2, XML, RDF, Atom), colour, and size,
  such as and .
• Other times there may not be an image, but text
  with one of those lables, or a link labeled
  Syndicate this site.

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Miscellaneous

• GeoURL has a database of websites along with the
  physical location (latitude and longitude) that
  the website (or creator) lives in.
• Many, but not all of the websites are blogs.
• Click on the map, and you will see a listing of
  websites within 500 miles of the spot you choose.

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Miscellaneous

• SourceForge is a gigantic software development
  website, where thousands of open source projects
  are developed.
• SourceForge itself has a number of RSS feeds, as
  does every single project.

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Miscellaneous

• myRSS allows you to create RSS feeds for websites
  that dont already have them.
• The scraping (see paragraph two of this page)
  isnt perfect, but it works well for many sites.
• It is free, but only updates once a day and shows
  self advertising, unless you sponsor them.

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Miscellaneous

• So, it would still be a good idea to e-mail the
  webmasters and ask them to create an RSS feed.
• People have already used myRSS to create lots of
  feeds you can search, browse using DMOZ
  categories, and check out the top 100 RSS feeds
  by popularity.

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