Spatial objects other than points and boxes can be stored in spatial indexes, but the techniques usually require the use of approximations that can be arbitrarily bad. This leads ...
Database caching supports declarative query processing close to the application. Using a full-fledged DBMS as cache manager, it enables the evaluation of specific project-select-...
The handling of user preferences is becoming an increasingly important issue in present-day information systems. Among others, preferences are used for information filtering and ex...
Logic and databases have gone a long way together since the advent of relational databases. Already the rst basic query languages for relational databases beside relational algebra...
Users attempt to express their search goals through web search queries. When a search goal has multiple components or aspects, documents that represent all the aspects are likely ...