Definition: In this type of data system, all participating source systems copy their data to a single, centrally-located data repository where they are organized, integrated, and stored using a common data standard. Data in a centralized Statewide Longitudinal Data System (SLDS) are periodically matched, integrated, and loaded into a central repository. Users query the system and can access the data to which they have been authorized to view and use.
Source: Taken from Statewide Longitudinal Data System (SLDS) Grant Program, http://nces.ed.gov/programs/slds/pdf/federated_centralized_print.pdf
DaSy Framework Component: System Design and Development