Transcript
Web 2.0
Usage, Concepts, Technology
Presented byMartin Etzel
Table of contains• 1 What is Web 2.0?• 2 Community – a social web
– 2.1 social Information exchange– 2.2 Collective Indexing– 2.3 Internet based Communication– 2.4 social networks– 2.5 Browser based Applications
• 3 Technical side of Web 2.0– 3.1 AJAX Code example– 3.2 Advantages, Disadvantages– 3.3 AJAX Frameworks
• 4 Economical aspects of Web 2.0• 5 Future of the web• 6 References
1. What is Web 2.0?• Indicates a change in Web
usage– Two-way communication– Users can change pages
User become editors
• A terms for a combination of many (new) technologies
2. Community – a social web• Humans want to
communication• Present themselves
2.1 Social information exchange
• WikisMediaWiki Presentation
http://localhost:85/MyWiki/
• Blogs• Exchange of other medias
– Videos– Audio– Pictures– Texts
2.2 Collective Indexing• Social book marking• User tag content• Recommending of
products
2.3 Internet based communication
• Real time messages• Chat• Instant Messaging • Internet telephony/VoIP• Videoconferencing
2.4 Social networks• Meet people and stay in
contact– MySpace– Xing– StudiVZ– Facebook– …
2.5 Browser based applications• Everywhere
available• Image
processing– Snipshot.com
• Text/Table– Goggle Docs
• …
Example browser based applications: Goggle docs
2.6 Summary of Web 2.0 Application
E-Mail, FTP
WebServices
© [Beck 2007] Beck, A.: Web 2.0: Konzepte, Technologie, Anwendungen. HMD – Praxis der Wirtschaftsinformatik, Heft 255, Juni 2007
3. The technical side• AJAX (Asynchronous JavaScript and XML)– JavaScript– XML
• Adobe Flash– ActionScript
• RSS feeds
3.1 AJAX Code example• HTML
– <input type="text" id="txt1" onkeyup="showHint(this.value)">
– <span id="txtHint"></span>
• JavaScript– Generate XMLHttpRequest Object
– xmlHttp.onreadystatechange=fReady;
– xmlHttp.open("GET",url,true);
– xmlHttp.send(null);
– function fReady()
– document.getElementById("txtHint")
.innerHTML=xmlHttp.responseText;
• Serverside e.g. PHP– Return a list of sugestions
(c) http://www.w3schools.com/ajax/ajax_source.asp
3.2 Advantages, Disadvantages
• Faster response to actions• Less bandwidth needed• Separation of data and
format
• Missing integration in Browser (no back button)
• No Bookmarks• Unknown loading time
3.3 AJAX Frameworks• ASP.NET
– ASP.NET AJAX (Atlas)• PHP
– AjaxAC• Java
– DWR Direct Web Remoting– GWT Google Web Toolkit
• Only Client side– Prototype
• More than 150…
4. Economical aspects of Web 2.0
• Marketing – let your customers work– Fan article for blogs– New places for PR
• Communication in/of enterprises– Wikis– Blogs– Xing
5. Future of the web• More and more use of
Web 2.0• Let costumers design your
product• Other medias use web for
response• Virtual reality• Witch frameworks,
languagesSemantic Web?
Questions
Thanks for your attention!
6 References/Literature• http://www.exforsys.com/tutorials/aja
x/advantages-and-disadvantages-of-ajax.html (accessed 15.12.07)
• [O’Reilly 05] O’Reilly, T.: What Is Web 2.0. Design Patterns and Business Models for the Next Generation of Software
• [Beck 07] Beck, A.: Web 2.0: Konzepte, Technologie, Anwendungen. HMD –Praxis der Wirtschaftsinformatik, Heft 255, Juni 2007
• [Peters 07] Peters, I., Stock,W.: Web 2.0 im Unternehmen. Wissensmanagement, Nr. 4/07, S. 22-25, Juni 2007
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