Grammar Inference for Web Documents

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Executive Summary

Presentational XML documents, such as XHTML or Presentation MathML, use XML tags mainly for formatting purposes, while descriptive XML applications, such as a well-structured movie database, use tags to structure data items in a semantically meaningful way. There is little semantic connection between tags in a presentational XML document and its content, so the tagging is often complex and seemingly ambiguous. These differences make inference of the underlying structure more difficult for presentational XML.

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