Record-Boundary Discovery in Web Documents

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Record-Boundary Discovery in Web Documents (1999)

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by Embley Jiang , Y. S. Jiang , Y. -k. Ng

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127 - 20 self

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@INPROCEEDINGS{Jiang99record-boundarydiscovery,
    author = {Embley Jiang and Y. S. Jiang and Y. -k. Ng},
    title = {Record-Boundary Discovery in Web Documents},
    booktitle = {},
    year = {1999},
    pages = {467--478}
}

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Abstract

Extraction of information from unstructured or semistructured Web documents often requires a recognition and delimitation of records. (By "record" we mean a group of information relevant to some entity.) Without first chunking documents that contain multiple records according to record boundaries, extraction of record information will not likely succeed. In this paper we describe a heuristic approach to discovering record boundaries in Web documents. In our approach, we capture the structure of a document as a tree of nested HTML tags, locate the subtree containing the records of interest, identify candidate separator tags within the subtree using five independent heuristics, and select a consensus separator tag based on a combined heuristic. Our approach is fast (runs linearly for practical cases within the context of the larger data-extraction problem) and accurate (100% in the experiments we conducted). Keywords: data extraction, data structuring, unstructured data, data records, r...

Keyphrases

web document record-boundary discovery record boundary data structuring nested html tag data record record information data extraction multiple record candidate separator tag data-extraction problem semistructured web document heuristic approach information relevant independent heuristic practical case unstructured data consensus separator tag

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