Abstract. Many realistic user tasks involve the retrieval of specific entities instead of just any type of documents. Examples of information needs include ‘Countries where one ...
Arjen P. de Vries, Anne-Marie Vercoustre, James A....
We designed and implemented a digital library system that supports content-based retrieval of multimedia objects based on MPEG-7 and XQuery. MPEG-7, a metadata standard for multim...
Transaction time is the time of a database transaction, i.e., an insertion, update, or deletion. A transactiontime database stores the transaction-time history of a database and s...
To facilitate queries over semi-structured data, various structural summaries have been proposed. Structural summaries are derived directly from the data and serve as indices for ...
In this paper we describe Racer, which can be considered as a core inference engine for the semantic web. The Racer inference server offers two APIs that are already used by at le...