Web 2.0

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Web 2.0
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What is it?

• A Buzzword popularized by OReilly Media and
  MediaLive International
  
• Web 2.0 sites often use a combination of
  techniques
  
• APIs
• Ajax
• Web Syndication
• A heavy focus on social functions
• E.g. Blogs and Wikis

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Web 2.0 By Example
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Web 2.0 Topics

• Web as a platform
• Harnessing collective intelligence
• Data is the next Intel Inside
• End of the software release cycle
• Lightweight programming models
• Software above the level of a single device
• Rich user experiences

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Web as a Platform

• Netscape vs. Google

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Harnessing Collective Intelligence

• Hyperlinking
• Google Page Rank
• eBays product
• Amazon its users
• Wikipedia
• Del.icio.us Flickr
• Collaborative Spam Filters (CloudMark)
• Blogging
• The wisdom of crowds
• RSS

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Data is the next Intel Inside

• The raceis on to own certain classes of core
  data
  
• Location
• Identity
• Calendaring of public events
• Product identifiers
• Namespaces

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End of the Software Release Cycle

• Software is delivered as a service, not a
  product
  
• Operations must become a core competencythe
  software will cease to perform unless it is
  maintained on a daily basis.
  
• Users must be treated as co-developers
• The perpetual beta
• User Testing
• Release early, release often

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Lightweight Programming Models

• Web Services
• SOAP (Simple Object Access Protocol)
• REST (Representational State Transfer)
• Data Representations
• XML
• JSON
• Organic web services
• Ajax (Javascript and XML)
• Think syndication, not coordination
• Design for hackability and remixability

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Software Above the Level of a Single Device

• Web Software no longer constrained to the PC
• iPod
• TiVo
• Flickr Photo Frames

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Rich User Experiences

• Ajax (term coined by Jesse James Garrett of web
  design firm Adaptive Path)
  
• Not a technologyits several
• Standards-based presentation using XHTML and CSS
• Dynamic display and interaction using the
  Document Object Model (DOM)
  
• Data interchange and manipulation using XML and
  XSLT or JSON
  
• Asynchronous data retrieval using XMLHttpRequest
• And Javascript binding everything together
• Sites using Ajax
• Theres a crap-ton MasterWish, Flickr, Blingo,
  Digg, Netflix, Writely to name a few.