Data sources contain data obtained with various result readers technologies, such as
file sources, ascii extract, and readsim.
Data sources are defined for the current study, not just for individual output
responses. That is, Data Source 1 is accessible across all output response
definitions.
Tip: If the data source is retained, the array of data is stored for future
use. If the data source is not retained, the array of data is discarded after the
extractions are complete. It is recommended to retain the information unless disk
space is a concern. To retain a data source, select its corresponding checkbox in
the Retain column.