Indexing XML documents 
By David Mertz, Ph.D. - As XML document storage formats become popular, especially for prose-oriented documents, the task of locating contents within XML document collections becomes more difficult. This column extends the generic full text indexer presented in David's Charming Python #15 column to include XML-specific search and indexing features. This column discusses how the tool design addresses indexing to take advantage of the hierarchical node structure of XML.
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