Creating a popular new computing approach always seems to bring with it a familiar catch-22: security issues. Web services--and XML--is no exception.

XML documents allow document owners to create their documents in their own formats (element names and structure). The same information might be described in several ways. To find the similarity ...

We find a set of XML path expressions that capture the contextual meaning of a keyword query. Paths in the contexts of the query are used to expand the original query to improve the effectiveness of ...