INTRODUCTION The term "Web 2.0" is commonly associated with web applications that facilitate interactive information sharing, interoperability, user-centered ... A Web 2.0 site allows its users to interact with each other as contributors to the website's content, Examples of Web 2.0: web-based communities, hosted services, web applications, social-networking sites, video-sharing sites, wikis, blogs, mashups, and folksonomies.
They can build on the interactive facilities of "Web 1.0" to provide "Network as platform" computing,
These sites may have an "Architecture of participation" that encourages users to add value to the application as they use it.
The concept of Web-as-participation-platform captures many of these characteristics.
TECHNOLOGY OVERVIEW This web site include some of the features and techniques they are Search: Finding information through keyword search. Links: It links the information together [meaningful information ]using the models of the web. it provide low barrier social tools Authoring: The ability to create and update content leads to the collaborative work of many rather than just a few web authors.
Xml and Rss
INTERNET APPLICATION Rich Internet Applications (RIAs) are web applications that have many of the characteristics of desktop applications, typically delivered either by way of a site-specific browser, via a browser plug-in, or independently via sandboxes or virtual machines. Adobe Flash, Java and Microsoft Silverlight are currently the three top frameworks, with penetration rates around 95%, 80% and 45% respectively.
XML AND RSS Advocates of "Web 2.0" may regard syndication of site content as a Web 2.0 feature, involving as it does standardized protocols, which permit end-users to make use of a site's data in another context (such as another website, a browser plugin, or a separate desktop application). Protocols which permit syndication include RSS (Really Simple Syndication — also known as "web syndication"), RDF (as in RSS 1.1), and Atom, all of them XML-based formats. Observers have started to refer to these technologies as "Web feed" as the usability of Web 2.0 evolves and the more user-friendly Feeds icon supplants the RSS icon.
WEB APLS Web 2.0 often uses machine-based interactions such as REST and SOAP. Often servers use proprietary APIs, but standard APIs (for example, for posting to a blog or notifying a blog update) have also come into wide use. Most communications through APIs involve XML or JSON payloads. Web Services Description Language (WSDL) is the standard way of publishing a SOAP API and there are a range of Web Service specifications. See also EMML by the Open Mashup Alliance for enterprise mashups.
USAGE The term Web 2.0, along with the increasing use of blogs, wikis, and social networking technologies, has led many in academia and business to coin a flurry of 2.0s, including Library 2.0, Social Work 2.0, Enterprise 2.0, PR 2.0, Classroom 2.0, Publishing 2.0, Medicine 2.0, Telco 2.0, Travel 2.0, Government 2.0, and even Porn 2.0.