(http://en.wikipedia.org/wiki/Web_2)
Recently, rich-internet application techniques such as Ajax, Adobe Flash, Flex, and Silverlight have evolved that have the potential to improve the user-experience in browser-based applications. These technologies allow a web-page to request an update for some part of its content, and to alter that part in the browser, without needing to refresh the whole page at the same time.So basically, Web 2.0 is this really neat thing that is definitely a sign of the times. 2008 is going to be a great year for Web 2.0 products and sites. I'm excited, R U?
The sometimes complex and continually evolving technology infrastructure of Web 2.0 includes server-software, content-syndication, messaging-protocols, standards-oriented browsers with plugins and extensions, and various client-applications. The differing, yet complementary approaches of such elements provide Web 2.0 sites with information-storage, creation, and dissemination challenges and capabilities that go beyond what the public formerly expected in the environment of the so-called "Web 1.0".Web 2.0 websites typically include some of the following features/techniques:
- rich Internet application techniques, often Ajax-based
- semantically valid XHTML and HTML markup
- microformats extending pages with additional semantics
- folksonomies (in the form of tags or tagclouds, for example)
- Cascading Style Sheets to aid in the separation of presentation and content
- REST and/or XML- and/or JSON-based APIs
- syndication, aggregation and notification of data in RSS or Atom feeds
- mashups, merging content from different sources, client- and server-side
- weblog-publishing tools
- wiki or forum software, etc., to support user-generated content
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