System and method of automatic wrapper grammar generation
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United States of America Patent
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Sep 14, 2004
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N/A
app pub date -
Jul 26, 1999
filing date -
Jul 26, 1999
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Abstract
A method for generating a wrapper grammar for a file having a structure of a particular format includes providing at least one sample file of the particular format, where the particular format comprises a plurality of string tokens. Each sample file includes a plurality of tokens (data strings) which may be actual data from the document, an HTML tag or some other grammatical separator. The sample file of the particular format is then processed by annotating attributable tokens with a user-defined attribute, such as Author, Title, etc. from a set of attributes to form an annotated sample set. The annotated sample set is then evaluated to determine if wrapper grammar generation is possible, and if it is possible, a wrapper grammar for the files having a structure of the particular format is generated. Preferably, the annotated sample set is evaluated by determining if all attributes in the annotated sample set are distinguishable from one another.
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