Techniques for of providing data from a plurality of data sources are disclosed. A plurality of modules are provided at a common access point. Each module defines data on a respective one of a plurality of data sources, the data including information on data available from the respective data source. In response to a request for data from one of the plurality of data sources at the common access point, data is retrieved from the respective data source using the data on the data source from the respective module. Data is provided from the common access point in dependence on the retrieved data.