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IR CW2–09 Webpage summarization 01/13 Can webpage summarization improve the search engine user experience? By Barney Staddon.

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Presentation on theme: "IR CW2–09 Webpage summarization 01/13 Can webpage summarization improve the search engine user experience? By Barney Staddon."— Presentation transcript:

1 IR CW2–09 Webpage summarization 01/13 Can webpage summarization improve the search engine user experience? By Barney Staddon

2 IR CW2–09 Webpage summarization 02/13 The need for webpage summarization Types of summary The approaches The problems The solutions (Do they work?) Conclusions

3 IR CW2–09 Webpage summarization 03/13 The need for webpage summarization Vertical listing is used by most search engines If a summary is provided, shouldn’t it be useful? “Only 1 in 4 user-queries is initially successful ” Microsoft (2009) A good summary could avoid ‘dead’ visits Fewer ‘dead’ visits makes a better experience

4 IR CW2–09 Webpage summarization 04/13 Types of summary Extract or abstract? Query-relevant or generic?

5 IR CW2–09 Webpage summarization 05/13 The approaches Content-based summarization: Target webpage Summary

6 IR CW2–09 Webpage summarization 06/13 The approaches Context-based summarization: (source: Amitay & Paris, 2000)

7 IR CW2–09 Webpage summarization 07/13 Content problems Webpage text Is there a pre-authored summary available? What text is important and relevant? Are words, phrases or sentences extracted? Is it good quality? Summary

8 IR CW2–09 Webpage summarization 08/13 Context problems Content text Where does the context come from? Is there enough context text and is it relevant? Are words, phrases,or sentences extracted? Is it good quality? Summary

9 IR CW2–09 Webpage summarization 09/13 The solutions Open Directory Project HTML parser Term Frequency – Inverse Document Frequency Lexical chains (disambiguation) Sentence segmentation Contextual linking Contextual query data

10 IR CW2–09 Webpage summarization 10/13 Bing ‘hover’ (www.lsbu.ac.uk)

11 IR CW2–09 Webpage summarization 11/13 Bing ‘hover’ (www.football.co.uk)

12 IR CW2–09 Webpage summarization 12/13 Conclusions Content-based summarization - More likely to find good quality pre-authored summary - Random extracts can be more like a preview - More space is useful Context-based summarization - Only as good as the search engine it’s linked to - Requires greater processing power Can webpage summarization improve the search engine user experience? Yes! Preview/summary/excerpt/snippet – representative & viewable. Is cohesion necessary? A better way to present?

13 IR CW2–09 Webpage summarization 13/13 Can webpage summarization improve the search engine user experience? Questions References: Microsoft. (2009). Bing: New Features Relevant to Webmasters. [Online]. Available from: publishers-released.aspx [Accessed 03/12/09] publishers-released.aspx Amitay, E. and Paris, E. (2000). Automatically Summarising Web Sites - Is There A Way Around It? [Online]. Available from: amitay.pdf?key1=354816&key2= &coll=GUIDE&dl=GUIDE&CFID= &CFTOKEN= [Accessed 03/12/09]http://delivery.acm.org/ /360000/354816/p173- amitay.pdf?key1=354816&key2= &coll=GUIDE&dl=GUIDE&CFID= &CFTOKEN= [Accessed 03/12/09]


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