Computinghasbeenanenormousacceleratortoscienceandindustryalikeandit has led to an information explosion in many di?erent ?elds. The unprecedented volume of data acquired from sensors, derived by simulations and data analysis processes, accumulated in warehouses, and often shared on the Web, has given risetoanew?eldofresearch: provenancemanagement.Provenance(alsoreferred to as audit trail, lineage, and pedigree) captures information about the steps used to generate a given data product. Such information provides important documentation that is key to preserving data, to determining the data's...