Method for automatic wrapper repair
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United States of America Patent
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Oct 21, 2008
Grant Date -
Apr 20, 2006
app pub date -
Dec 5, 2005
filing date -
Jul 18, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A method of information extraction from a Web page using an initial wrapper which has become partially inoperative, wherein the initial wrapper comprises an initial set of rules for extracting information and for assigning labels from a wrapper set of labels to the extracted information, includes using the initial set of rules to extract strings from the Web page parsed in forward direction; analyzing the extracted strings according to the initial set of rules for assigning labels associated with the wrapper; assigning labels to those strings which satisfy the label rules; using the initial set of rules to extract strings from the Web page in backward/(opposite) direction; analyzing the extracted strings according to the set of rules for assigning labels associated with the wrappers; and assigning labels to those unlabeled strings from which satisfy the label rules.
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