1) The document discusses the evolution of data warehousing from static reporting databases to more advanced analytical applications. However, these static snapshots of data could not provide the most up-to-date information needed to act on business intelligence analyses.
2) It introduces the concept of an operational data store (ODS) that provides integrated, comprehensive and current data to enable businesses to act on analytical insights.
3) It describes how the traditional data warehouse provided static snapshots of data from the past, while an ODS contains live, current records to facilitate real-time decision making. This combination of static snapshots and live operational data is called an active data warehouse.