text: **10.1 Introduction**
  
  For this chapter, unless explicitly stated otherwise, the term “data” is used to refer to the 
  report data, the extracted documents or segments, and their related indexes and the 
  extracted resources. 
  
  A Content Manager OnDemand system logically stores data in*application groups*. An 
  application group is defined by the Content Manager OnDemand administrator. It consists of 
  data that has the same indexing, data storage, and expiration requirements. The application 
  group definition also specifies where the report and document data are stored, how long the 
  data is stored, and how the data expires. The method or methods that can be used to expire 
  the data are a function of the application group parameters that are defined before the data is 
  loaded into Content Manager OnDemand. In a Content Manager OnDemand system, data 
  typically goes through a lifecycle of loading, storing, migration, and an expiration process. 