Techniques for Location-Based Services
Purdue University & CERIAS, IN, USA
The talk outlines solutions to the
problem of location privacy in mobile distributed applications. It
then summarizes a novel approach that takes into account personal
privacy preferences by individuals. The approach is highly efficient
and experiments have shown that can be deployed on small devices.
About X (ML | Path | Query |
Jan Paredaens -
University of Antwerp, Belgium
XML has become a very important format for data and
document processing. Many languages have been recently developed for
querying and transforming XML documents. The most prominent of these
languages are XPath, XQuery and XSLT, that are correlated since XQuery and
XSLT both use XPath. The complete description of these languages is vast and
rather complex, and is surely not useful for educational reasons. Therefore
we define three sublanguages, LiXPath, LiXQuery and LiXSLT, whose
syntactical and semantical definitions are uniform, clean, selfcontained,
compact and elegant. Furthermore the semantical structure of these three
languages is completely different: LiXpath only can extract nodes; LiXQuery
gives a new document as a result, depending on one or more documents.
Finally, the process of the evalation of an XSLT stylesheet (ie., XSLT
query) is remarkable, in the sense that it describes how the given
stylesheet tree is transformed into the result document tree.