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Emerging Technology: RSSUnderstanding RSS
CATS 2005 Presentation
Steve [email protected]://sloantech.blogspot.com/
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Understanding RSS
All you need to know:
Keeping it simple!
Good functional definitions
RSS (pronounced "arr-ess-ess") is a web syndication protocol primarily used by news websites and weblogs
Format for delivering summaries of regularly changing web content
RSS is the format for repackaging and viewing content from changing websites
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Goals Define key terms associated with RSS
Provide an overview of the technologies associated with RSS
Discuss how RSS, and related technologies, can be a way to manage information
Discuss possible ways that RSS and related technologies may evolve
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Really Simple Syndication
A family of XML based web-content distribution and republication (Web syndication) protocols primarily used by news sites and weblogs.
Other definitions
Rich Site Summary
RDF Site Summary
Terms: RSS
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RSS: A technical definition
More than you need to know:
RSS is a file format that allows anyone with a website — from large media companies to individual commentators — to easily "syndicate" their content, similar to how comic strips and popular columns are syndicated by their owners to hundreds of newspapers. Except that on the Web, the RSS syndication is usually free, and the content that is syndicated is often not the full entry, but excerpts and links back to the originating website.
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Terms: Weblog A weblog, Web log or simply a blog, is a web application which contains periodic, reverse chronologically ordered posts on a common webpage.
Such a Web site would typically be accessible to any Internet use
The changing nature of weblogs, and their reverse chronological ordering, makes them especially suited to RSS feeding
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Terms: Feed A file document, in XML format, associated with a changing website, typically a weblog
As with all XML documents, RSS documents employ a set of tags that describe elements of the text
Typically these files are updated dynamically as the site changes
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Terms: Aggregation
A program that reads an RSS or an Atom feed is called an aggregator
Aggregator programs collect data from multiple feeds and consolidate them into a simple to navigate view
Aggregators are typically constructed as extensions to a Web browser, as extensions to an email program, or as standalone programs
An aggregator program is also called a reader
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Terms: Syndication Making Web feeds available from a site so other people can display an updating list of content from it
Focuses on changing content
For example: one's latest forum or weblog postings, etc.
This originated with news and blog sites but is increasingly used to syndicate any information
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How does RSS work?
Feeder
The XML format file is typically updated dynamically by a web application that lists and links changes to a web site
Reader
A program known as an RSS aggregator, or feed reader, checks RSS-enabled feeds on behalf of a user and displays any updated information that it finds
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Standards(RSS and Atom) Many flavors of RSS
.9x, 1.x, 2.x
Atom (a fork in the road!)
Rooted in RSS
Not backwardly compatible with any of the previous RSS versions
Feedburner™ converts Atom to RSS
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RSS 2.0 and enclosures
Allows for attachments called “enclosures”
Podcasting
Download based
Videocasting
Mediablogging
Mobile blogging (moblogging)
Download, not streaming
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Consuming an RSS feed
Each feed is like a food
Each feed is unique
The reader is like a meal
A well rounded meal is an aggregation of foods
An RSS reader is the program that presents the information feeds
The reader provides the user interface
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Headlines
Content
Feeds
A typical RSS feed
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Many faces of RSS
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How do RSS readers differ?
Three basic types of client side applications
Extensions to a Web browser
Extensions to an email program
Standalone programs
Can be Web applications
Can have widely different user interfaces
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Web based readers Bloglines
Your RSS feeds can be shared
You see what the people you read read
My Yahoo
NewsGator Online
Free
DiVX connected devices
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Local RSS readers Different 3rd party readers for PC + MAC
Hundreds of readers
List too long to include
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The real-time web Technorati
Uses RSS to track the popularity of weblogs by keeping track of links between them
Attention.xml
Extends the RSS reader by focusing on what people are reading and what information matches the profile of what you normally do read
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Future of RSS Social groups and human relations will be mapped and extend into RSS
XFN, FOAF and Rojo
Rich content can be delivered via download, using RSS
Ability to deliver rich content will grow
Podcasting
Videocasting
Mobile devices
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Mobile devices and RSS
Portable devices with always-on connection will grow market for download based media
Ability to create, post and access information nears ubiquity
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Secure RSS? Is there such a thing?
Transparency not always desired
Secure RSS 2.0 and SSH/SSL encryption technologies could be employed
Private channels One to one
One to few
One to many
RSS = “Digital Dial Tone”
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Transparency By nature RSS is transparent This can be good or bad
May violate privacy
Invites the world into the classroom
Some solutions for this
Use application layer security (SSL/SSH)
Secure RSS?
Do we adapt to provide more transparency, or do we adapt the tool to provide greater security? Route around nature of Internet may make it difficult to
not be transparent
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RSS Pitfalls Get all the news you want, and none you don’t?
Folks can subscribe to channels that only fit their world view
Increase polarization
More Red vs. Blue
Raising the bar on information compilation
Increase stress and anxiety
Aggregation aggravation
Overload
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Contact info and conversation
(408) 924-2374
GeneralSkype/AIM: ssloansjca
Web: www.edupodder.comMain Geek Blog: sloantech.blogspot.com
(408) 605-0692
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My Favorite Feeds Bob Scoblescoble.weblogs.com “The human aggregator”
VersiontrackerBoth windows and mac
ItconversationsTreasures of information
Backup BrainDori Smith & her husband
The Big PictureSJSU Alpha Prof Dennis Dunleavy
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www.sjsu.edu/cats/2003/showcase/