The provenance of data has recently been recognized as central to the trust one places in data. It is also important to annotation, to data integration and to probabilistic databases. Three workshops have been held on the topic, and it has been the focus of several research projects and prototype systems. This tutorial will attempt to provide an overview of research in provenance in databases with a focus on recent database research and technology in this area. This tutorial is aimed at a general database research audience and at people who work with scientific data. Categories and Subject Descriptors H.2 [Database Management]: General General Terms Documentation Keywords data provenance, lineage