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Dfference between web 1.0 and web 2.0

“Web” is a fancy catch-all phrase for the Hypertext Transfer Protocol (HTTP, the protocol used for transferring information between a Web server and Web browser) and the Hypertext Markup Language (HTML, the markup language that tells your browser how to display whatever text, graphics, etc is coming through the HTTP). Over at the World Wide Web Consortium (W3C), there actually are versions of these protocols. HTTP for example is still on version 1.1 and has been since 1999. The most recent of HTML (version 4.01) is just as old. There is something over at the W3C in draft mode called XHTML which is now at version 2.0 and has relevance to the future Web. But a one-to-one mapping of it directly to Web 2.0, especially when you consider how many things have been dropped into the Web 2.0 bucket that don’t use XHTML, doesn’t work either.

If you looked at all the Web applications and sites that have been dropped into that Web 2.0 bucket, one of the more common ingredients would probably be use of the AJAX (Asynchronous Javascript and XML) programming technique — a technique that generally speaking adds an element of real-time interactivity to Web pages that might otherwise be very static. Google’s Gmail e-mail service, for example, uses AJAX to keep your view of the inbox updated as new mail arrives with out having to refresh the entire Web page. I’m fairly certain that AJAX is also the enabler of Gmail’s autosave feature (that automatically saves drafts to Gmail’s servers for you as you are writing your emails). But three problems that are common to many if not all AJAX-based pages is how they often interfere with the functionality of a Web browser’s back button (in most cases, it either doesn’t work, or it takes you back to a page that you don’t want to be taken back to). Another is that the forward button (when advancing to a page with AJAX code on it) yields unpredictable results as well. And finally, the same goes for bookmarking AJAX-driven pages.

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So, when people ask me what Web 2.0 is, a lot of times, I say “It’s when the back button doesn’t work! (something that usually works with Web 1.0… but not always). The other thing I say is that I don’t think there’s a trade or servicemark on “Web 1.0.” That’s a big difference too.