1. Presented By:- Thomas Steiner Raphael Troncy Michael Hausenblas Reviewed By:- Sudeep Malik sudeepma@usc.edu Professor :- Chris Mattmann

2. * How Google make use of linked data for Displaying Rich Snippet. * We will see an example. * Then we give some thoughts how it can be extended in future. * In the end we outline bottlenecks in current Internet which need to be fixed to make it work on web scale. 4/25/2013Linked Data today & Vision for Tomorrow 2

3. 4/25/2013 Linked Data today & Vision for Tomorrow 3 * These slides are related with the lecture of rich snippets in our course which was the last lecture. * You will see examples of how to embed RDFa, microformat in slides 10,16and 18. * You can also see more examples of rich snippets in all our the course slides. * This paper gives some insight how we can deploy rich snippets all over the web.

4. * Google introduced Rich Snippets on May 12,2009. * What is Rich Snippet? It is a small summary of the data that a user can expect to see on a page without loading the whole page. * Formats Supported are:- a. RDFa b. Microformats c. Microdata 4/25/2013Linked Data today & Vision for Tomorrow 4

5. * RDFa (Resource Description Framework):- It adds a set of attribute level extension to HTML,XHTML and XML for embedding rich metadata within a web document. * Microformat:- It is reusing the existing HTML/XHTML tags to convey metadata and other attributes in web pages. * Microdata :- It is a proposed feature of HTML5 intended to provide a simple way to embed a semantic markup into HTML documents. 4/25/2013Linked Data today & Vision for Tomorrow 5

6. 4/25/2013Linked Data today & Vision for Tomorrow 6

7. * Some statistics regarding semantic markup on web in June 2010. * They also observed a general confusion with what parts of a document should be marked up at all. 4/25/2013Linked Data today & Vision for Tomorrow 7

8. * How search results are displayed in snippets preview involve a huge market. * The overall tendency being an increasing number of impressions for Rich Snippets-enabled pages. * It also result into higher click-through rate for pages with Rich Snippets. * Example:- A sample of song so that user can make sure that he is looking for the same song. 4/25/2013Linked Data today & Vision for Tomorrow 8

9. * Suppose we are searching for a music concert, things we would expect are comparative Rich Snippets as shown in next slide. * Next step is to bring the social experience, granted the user has given access to his social graph. Example: A user’s decision criteria whether or not attend an event is often dependent on whom of the user’s friends plan to attend the concert. 4/25/2013Linked Data today & Vision for Tomorrow 9

10. Philipp Poisel Concert 4/25/2013Linked Data today & Vision for Tomorrow 10

11. * A different class of extended Rich Snippets could be based on multimedia semantics in order to provide richer video search result. Example:- 4/25/2013Linked Data today & Vision for Tomorrow 11

12. * Today’s Rich Snippets:- The content of snippet is exclusively determined by information in one particular Web page. * Extended Rich Snippets:- The content of snippet will be from more than just one data Source. * For extended rich snippets we need to combine information coming from various data sources for that we need an information sharing mechanism must be established. 4/25/2013Linked Data today & Vision for Tomorrow 12

13. * In content-centric networking there are two kind of packages. 1. Interest Package. 2. Data package. * Interests get broadcast by consumers and as soon as a node can satisfy an interest, it responds with the data. Otherwise it rebroadcasts the interest. * A certain piece of information satisfies an interest if the content name in the interest package is a prefix of the content name in data packet. 4/25/2013Linked Data today & Vision for Tomorrow 13

14. * This is derived from content-centric networking. * Packets after applying principle of content-centric to Triple- centric. * It is useful when many parties are interested in the same content. Which is same case as with popular web pages. 4/25/2013Linked Data today & Vision for Tomorrow 14

15. * Some have proposed to add new Layer between application layer and presentation layer,that aims to make sense of the data in such a way that it establishes interoperability between different applications. * One of the potential bottlenecks of rolling out multi data sources rich snippets could be avoided by moving triple propagation to this new Triple-centric Networking Layer. * It establish the links between the data providers and facilitate the work of search engines to make sense of data and present it in efficient way. 4/25/2013Linked Data today & Vision for Tomorrow 15

16. * Pros:- 1. Triple-centric networking is potential improvement to the host-to host networking infrastructure. * Cons:- 1. Code given in paper was not explained properly. 2. Should have elaborated more about formats in Rich Snippets. 3. Triple-centric is in experimentation form so its not a sure thing as of now. 4. Addition of new layer doesn’t seem very promising. 4/25/2013Linked Data today & Vision for Tomorrow 16