Narrative documents and collections of such documents; e.g. generate a table of contents for a book
Data-oriented documents; e.g. SQL-like queries of an XML dump of a database
Filtering streams to process logs of email messages, network packets, stock market data, newswire feeds, EDI, or weather data to filter and route messages represented in XML, to extract data from XML streams, or to transform data in XML streams.
XML views of non-XML data