Query folding is a technique for determining how a query may be answered using a given set of resources, which may include materialized views, cached results of previous queries, ...
Query rewriting using views is an essential issue in data integration. A number of algorithms, e.g., the bucket algorithm, the inverse rules algorithm, the SVB algorithm and the M...
For several reasons a database may not satisfy certain integrity constraints (ICs), for example, when it is the result of integrating several independent data sources. However, mo...
Data sources for data integration often come with spurious schema definitions such as undefined foreign key constraints. Such metadata are important for querying the database and ...
Jana Bauckmann, Ulf Leser, Felix Naumann, Veroniqu...
We discuss query evaluation for XML-based server systems where the same query is evaluated on every incoming XML message. In a typical scenario, many of the incoming messages will...