a specialized version of a Data warehouse. The key difference is that the creation of a data mart is predicated on a specific, predefined need for a certain grouping and configuration of select data from a Core Data Warehouse. The primary function of data marts is to make data available to users, i.e. to support performance data analysis and dissemination.
ICAO (2009) doc. 9883, Manual on Global Performance of the Air Navigation System
Lexicon Release 2015.2