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AIC Seminar Series

Can Linked Data Help Hypertext Search?

Harry HalpinUniversity of Edinburgh[Home Page]

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Date:  Friday, March 26th 2010 at 3:00pm

Location:  EJ228 (SRI E building)  (Directions)


Linked Data represents the explosion of structured data given in the Semantic Web format RDF, released on to the real-existing hypertext Web. This data can be searched and indexed just like ordinary data using special purpose "Linked Data" search engines. Using a real query log from Microsoft Live and named entity and concept recognition, we show what kinds of queries can and can’t be answered by Linked Data, as well as how Linked Data demonstrates what features of RDF and OWL are actually used "in the wild". Then we present the first Cranfield-style evaluation of "semantic search" (the search for Linked Data), and then show how relevance feedback (using both vector-space and language modelling approaches) from hypertext search can improve semantic search, and - more interesting - vice versa. Lastly, we present upcoming work of us in co-operation with Yahoo! Research on using Mechanical Turk to "crowd-source" a large-scale evaluation of semantic search engines.

   Bio for Harry Halpin

I’m a researcher and postgraduate student of Henry S. Thompson and Andy Clark at the University of Edinburgh. I’m interested in the intersection of philosophy and the Web. In particular, what exactly are the secrets to the success of the Web and what lessons does this hold for computing in general, and especially artificial intelligence? In my current work I am analyzing both the underlying architecture of the Web using notions from information theory, type theory, the philosophy of computation. As a side interest, I’m also interested in how we can use machine-learning and natural language processing to make the massive amount of text on the Web easier to use, in particular through automatic ontology creation. This application comes from my interest in narrative analysis, which I did my MSc. thesis. I can usually be found in Edinburgh, but have been known to make guest appearances in New York City and the forests of North Carolina.

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