=====Historical data=====

===Definition===
Historica data is [[data_concept/data|data]] that describes a situation in the past.

===Notes===
  * Historical data should not altered except to correct an error.
  * Purpose of historical data can be reporting or analysis.

===Examples===
  * Point in time reports.
  * Database snapshots.
  * Previous versions of a [[data_concept/dataset|dataset]].

===Relations===
|Historical data|is child of|[[data_concept/data_category|data category]]|data category

===Reference===
McGilvray, Danette (2008). Executing Data Quality Projects. Ten Steps to Quality Data and Trusted Information. Morgan Kaufmann Publishers.

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