While the information published in the form of XML-compliant documents keeps fast mounting up, efficient and effective query processing and optimization for XML have now become mor...
Abstract. We present in this paper a new model for representing probabilistic information in a semi-structured (XML) database, based on the use of probabilistic event variables. Th...
Databases are often incomplete because of the presence of disjunctive information, due to con icts, partial knowledge and other reasons. Queries against such databases often ask q...
Managing multiple versions of XML documents represents an important problem, because of many applications ranging from traditional ones, such as software configuration control, to...
As XML finds its place in information technology, query languages for XML attract much attention. Among them XPath is the most known. This article reveals a surprising fact that ...