Analytical or informational use of virtual data services produce integrated information for reporting, dashboards, CPM scorecards and analysis from multiple underlying heterogeneous data sources. This data can be used to support decisions made by executives, line managers, front-line staff and external users. They may also integrate historical and live operational data (sometimes referred to as an extended data warehouse pattern) for a holistic view of business activity to support specific business tasks e.g. 360 degree view of the customer for sales. Data sources may include relational databases, files, enterprise applications, cloud data, NoSQL data stores, web services, spreadsheets, HTML and unstructured data.