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There is a huge disagreement among people about web2.0 and its applications. Some people are decrying that it is a meaningless marketing buzzword and other are accepting as the conventional wisdom.
This section will explain the difference with the help of various cases teasing out some of the essential elements of difference.
For example in case of doubleclick.com (web 1.0 application) verses overture and adsense (web2.0 application). Doubleclick is one of the siblings of internet like google.com , but doubleclick business modal was different from the google. According to the doubleclick web is all about advertisement an publishing , it does not require and participation form users.
But overture and google follows quite different modal . They believe that content from different various sites makes up the bulk of site's content “Leveraging the customer self service and algorithmic data management to reach out he entire web"
Author Tim O'Reilly
Traditional web1.0 applications are very restricted to allow user have control over them but on the other hand web2.0 applications are based on aggregation of the best work of thousands, then millions of web users. For example eBay's product are the collective activity of all its users. It grows in response to user activity . Ebay is playing a role of middleman between seller and consumer by providing the facility to access its specialized data.
Being a web2.0 based application ebay has more competitive advantage over web 1.0 based similar websites providing similar services .
As web 2.0 based application does not bound user to any kind of contracts. It earns revenue by providing the access to its specialized database and let users to grow application organically.
Author Tim O'Reilly
User contribution
The main difference between traditional web application and web2.0 applications is user contribution to application. For example amazon.com sells the same product as its competitors such as branesnandnoble.com , they both receive same product, product descriptions, table of content etc from their vendors but amazon.com's magnitude of sale is way more than branesandnoble.com because amazon.com's business modal involves user contribution. User can provide comments, reviews etc on the books they bought . Indirectly helping other user to make decision on the specific book.
Also amazon .com specialized database provide real-time rating of the books based on the sales. Whereas barnesandnoble.com likely lead their sponsored result ignoring user contribution.
Ref : http://www.oreillynet.com/
DoubleClick --> Google AdSense
Ofoto --> Flickr
Akamai --> BitTorrent
mp3.com --> Napster
Britannica Online --> Wikipedia
personal websites --> blogging
evite --> upcoming.org and EVDB
domain name speculation --> search engine optimization
page views --> cost per click
screen scraping --> web services
publishing --> participation
content management systems --> wikis
directories (taxonomy) --> tagging ("folksonomy")
stickiness --> syndication
Personal homepage and blogging
Personal homepage is around from the early days of web. It is just a basic blog where user can write his/her personal comments and other users can read it by accessing the homepage. Personal homepage provides very limited services to the user. Every time in-order to access the content of the homepage users have to open the specific page . But with help of web2.0 and its related technologies (example RSS) structure of the blog is revamped . Users can link not just to the personal blog, but can subscribe to it , with notification every time the page changes.
Data Centric
Every internet application is backed up with database, but the difference between traditional web application and web 2.0 based application lies in vendor control of its data while providing maximum flexibility to use information provided by the database.
For example in the case of amazon.com discussed above the database of barnesansnobles.com come from ISBN registry provider, but amazon enhanced its data by adding publisher supplied data such as table of content and sample material etc.
More importantly they harness the user contribution unlike barnesandnobles,com as result it provides amazon.com a competitive edges over its competitors .
Hyperlink verse Mash ups
In traditional web applications hyperlinks are the only way to link to other vendors services , users are directed to vendors web sites to use to the specific service , which can be frustrating for user who has a dial-up connection .and also jumping form one site to another can also loose interest of the user. But with the help of web2.0 and its related technologies developers can mash up several service provided by different vendors. For example houseingmaps.com uses contain google maps with craiglist appartment rental and home purchase data to create an interactive housing search tool.
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