web 2
TRANSCRIPT
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Did You Know?
A Video Tour of Trends
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Co-evolution
Applications Drive Technology
Innovations
Technology Enables New Applications
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Internet – A Time Line
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Internet
• Computers• Ethernet• TCP/IP• Born in late 60s and early 70s• Dominant Applications– FTP– Email– Defense Use
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Web 1.0
• Layered On Top of Internet• Sharing Documents• Protocol – http• Format – html• Very Static (initially)• Evolution– Dynamic Content– Data Driven
• Became mainstream with browser and Server development (both open source)
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Web 2.0 Tag Cloud
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Web 2.0 Apps
• Blogs ( Wordpress, Blogger)• Wikis (Wikipedia, Mediawiki)• Social Networks (Facebook, Orkut, LinkedIn,
Ning)• Podcasting (iTunes)• Social Bookmarking (Delicious, StumbleUpon)• Screencasting (CommonCraft)• Video (YouTube, Vimeo)
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Blogs
• A Blog is normally a single page of entries. • A blog is organized in reverse-chronological
order, • A blog is normally public -- the whole world
can see it. • A blog is written using a Web Based Editor
(can also be done using email or Word or any other authoring tool)
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A Blog Page
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Blog – A Mind Map
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Wikis• Wiki is a short form of Wiki Wiki Web• Wiki – A collaboration tool• A knowledge repository• Multiple authors• Multiple Roles (edit, view)• Wiki Words• Wiki Links• Back Links• Built In Search• Automatic Versioning• Wiki Engines• Wikis in Plain English (Video)
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Wiki Trends
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Other Uses of MediaWiki Engine
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Podcasting, Screen Casting And Sketch Casting
• Podcasting– (iTunes)
• Screen Casting– Camtasia
• Sketch Casting – Video
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Micro Blogging - Twitter
• Tweets• Re-Tweets• Twitter-Lists• Followers• Friends• Trends• Twitter-Search• Why is Twitter So Popular?
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Mashups
• A way to flexibly combine applications• Build custom applications in hours and days• Introduction to Mashups (Video)• Resources:– Programmable Web– Mashup Unconference– Enterprise Mashups
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RSS and Atom Feeds
• An XML based format for syndicating content• Blogs• News Feeds• Feed Readers– Google Reader
• Feed Search Engines• Feed Aggregators• RSS in Plain English (video)
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A Sample RSS Feed
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Social Media
• Social Media (Video)• Social Networks (Video)• Twitter – A micro-blogging service (video)• Blogs (Video)
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The Semantic Web
• Parallax Demo (video) - http://www.freebase.com/labs/parallax/index.html/
• Semantic Web (Video)• RDF Tutorial (video)
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An Example
@prefix : <http://www.example.org/> . :john a :Person . :john :hasMother :susan . :john :hasFather :richard . :richard :hasBrother :luke .
http://www.rdfabout.net/intro/?section=contents
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Semantic Web Concepts
• RDF – Resource Description Framework• Expresses semantics in triples• A web page consists of a set of RDF
statements• RDF can be embedded in web pages using
RDFa• SPARQL allows you to query web as a database
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RDF, RDFS, OWL
• Just like databases have a schema, RDF has a schema language called RDFS
• OWL is a Ontology Web Language to provide a more powerful description of resources and their valid relationships
• Different websites can share common vocabularies to refer to similar objects
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Some Sample Vocabularies
• FOAF – Friend of a Friend• BIO - A vocabulary for biographical
information• Dublin Core – Author meta data• GEO - A vocabulary for representing latitude,
longitude and altitude information• More info at:– http://www.schemaweb.info/
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Future Directions in Learning
• MIT Sketchboard• Siftables