Beyond XML Query Languages

bin the near future. This fact poses questions that the XML standard does not address. In particular,ffl How will data be extracted from large XML documents?ffl How will XML data be exchanged, e.g., by shipping XML documents or by shipping queries?ffl How will XML data be exchanged between user communities using different but related ontologies (orDTD's)?ffl How will XML data from multiple sources be integrated?Data extraction, transformation, and integration are all well-understood...