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10. SQL > XQuery and XML

XQuery and XML

Will XML affect the way we use search engines in the future?

Don: I think it’s possible. Search engines already exploit the kinds of metadata that are included in HTML tags such as hyperlinks. As you know, XML is a more extensible markup language than HTML. As we begin to see more XML-based standards for marking up specialized documents such as medical and business documents, I think that search engines will learn to take advantage of the semantic information in that markup.

You are now working on a new language called XQuery for accessing XML data. XML is different from relational data because it includes metadata. What challenges have you encountered when designing a query language for XML?


  

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