Previous studies of incomplete XML documents have identified three main sources of incompleteness – in structural information, data values, and labeling – and addressed data ...
For content level access, very often database needs the query as a sample image. However, the image may contain private information and hence the user does not wish to reveal the ...
Abstract. OWL is a recommended language for publishing and sharing ontologies on the Semantic Web. To manage the ontologies, several OWL data management systems have been proposed....
Myung-Jae Park, Jihyun Lee, Chun-Hee Lee, Jiexi Li...
We consider the problem of handling similarity queries in peer-to-peer databases. Given a query for a data object, we propose an indexing and searching mechanism which returns the...
Indrajit Bhattacharya, Srinivas R. Kashyap, Sriniv...
Answering queries using views is a well-established technique in databases. In this context, two outstanding problems can be formulated. The first one consists in deciding whethe...