We discuss update scheduling in streaming data warehouses, which combine the features of traditional data warehouses and data stream systems. In our setting, external sources push append-only data streams into the warehouse with a wide range of inter-arrival times. While traditional data warehouses are typically refreshed during downtimes, streaming warehouses update base tables and layers […]
Archives for July 2011
A Query Formulation Language for the Data Web
We present a query formulation language (called MashQL) in order to easily query and fuse structured data on the web. The main novelty of MashQL is that it allows people with limited IT-skills to explore and query one (or multiple) data sources without prior knowledge about the schema, structure, vocabulary, or any technical details of […]