What is about Web 2.0, Web 2.0 is a term which describes the trend in the use of World Wide Web technology and web design that aims to enhance creativity, information sharing, and, most notably, collaboration among users. These concepts have led to the development and evolution of web-based communities and hosted services, such as social-networking sites, wikis, blogs, and folksonomies. The term became notable after the first O’Reilly Media Web 2.0 conference in 2004. Although the term suggests a new version of the World Wide Web, it does not refer to an update to any technical specifications, but to changes in the ways software developers and end-users utilize the Web.
Characteristics Web 2.0 websites, allow users to do more than just retrieve information. They can build on the interactive facilities of “Web 1.0″ to provide “Network as platform” computing, allowing users to run software-applications entirely through a browser. Users can own the data on a Web 2.0 site and exercise control over that data. These sites may have an “Architecture of participation” that encourages users to add value to the application as they use it. This stands in contrast to very old traditional websites, the sort which limited visitors to viewing and whose content only the site’s owner could modify. Web 2.0 sites often feature a rich, user-friendly interface based on Ajax,,openlaszlo, Flex or similar rich media. The sites may also have social-networking aspects.
The concept of Web-as-participation-platform captures many of these characteristics. Bart Decrem, a founder and former CEO of Flock, calls Web 2.0 the “participatory Web” and regards the Web-as-information-source as Web 1.0.
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:
- Cascading Style Sheets to aid in the separation of presentation and content
- Folksonomies (collaborative tagging, social classification, social indexing, and social tagging)
- Microformats extending pages with additional semantics
- REST and/or XML- and/or JSON-based APIs
- Rich Internet application techniques, often Ajax and/or Flex,Flash-based
- Semantically valid XHTML and HTML markup
- 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
- Internet privacy, the extended power of users to manage their own privacy in cloaking or deleting their own user content or profiles.
http://en.wikipedia.org/wiki/Web_2.0
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