Automatic construction and adaptation of wrappers for semi-structured web documents.

Wong Tak Lam.Thesis (M.Phil.)--Chinese University of Hong Kong, 2003.Includes bibliographical references (leaves 88-94).Abstracts in English and Chinese.Chapter 1 --- Introduction --- p.1Chapter 1.1 --- Wrapper Induction for Semi-structured Web Documents --- p.1Chapter 1.2 --- Adapting Wrappers to Unseen Web Sites --- p.6Chapter 1.3 --- Thesis Contributions --- p.7Chapter 1.4 --- Thesis Organization --- p.8Chapter 2 --- Related Work --- p.10Chapter 2.1 --- Related Work on Wrapper Induction --- p.10Chapter 2.2 --- Related Work on Wrapper Adaptation --- p.16Chapter 3 --- Automatic Construction of Hierarchical Wrappers --- p.20Chapter 3.1 --- Hierarchical Record Structure Inference --- p.22Chapter 3.2 --- Extraction Rule Induction --- p.30Chapter 3.3 --- Applying Hierarchical Wrappers --- p.38Chapter 4 --- Experimental Results for Wrapper Induction --- p.40Chapter 5 --- Adaptation of Wrappers for Unseen Web Sites --- p.52Chapter 5.1 --- Problem Definition --- p.52Chapter 5.2 --- Overview of Wrapper Adaptation Framework --- p.55Chapter 5.3 --- Potential Training Example Candidate Identification --- p.58Chapter 5.3.1 --- Useful Text Fragments --- p.58Chapter 5.3.2 --- Training Example Generation from the Unseen Web Site --- p.60Chapter 5.3.3 --- Modified Nearest Neighbour Classification --- p.63Chapter 5.4 --- Machine Annotated Training Example Discovery and New Wrap- per Learning --- p.64Chapter 5.4.1 --- Text Fragment Classification --- p.64Chapter 5.4.2 --- New Wrapper Learning --- p.69Chapter 6 --- Case Study and Experimental Results for Wrapper Adapta- tion --- p.71Chapter 6.1 --- Case Study on Wrapper Adaptation --- p.71Chapter 6.2 --- Experimental Results --- p.73Chapter 6.2.1 --- Book Domain --- p.74Chapter 6.2.2 --- Consumer Electronic Appliance Domain --- p.79Chapter 7 --- Conclusions and Future Work --- p.83Bibliography --- p.88Chapter A --- Detailed Performance of Wrapper Induction for Book Do- main --- p.95Chapter B --- Detailed Performance of Wrapper Induction for Consumer Electronic Appliance Domain --- p.9