- portable file, the active file in a data set, or anything else
- on which a casereader interface has been overlaid. Casereader
- layering, in which a casereader acts as a filter or translator
- on top of another casereader, is also supported.
+ portable file, a dataset, or anything else on which a
+ casereader interface has been overlaid. Casereader layering,
+ in which a casereader acts as a filter or translator on top of
+ another casereader, is also supported.