Input files of category 3 models include layered files.
The following illustrations assume that you have one base. 
 Note: When refining layered input files, multiple layers can be mapped together to simplify the file if necessary.
Model 6: [all layers]
 Provide a single layered input file in which each layer in the file represents a layer in the version plan.
 
Model 7: [some layers]n
 Provide two or more layered files in which each file contains two or more layers. Each layer must represent a layer in the version plan and contain either base or version content.
 
Model 8: [1 base layer+ 1 version layer], [1 layer]n
Provide two or more layered files:
- One file containing two or more layers: one layer with base content and other layers with version content
- One or more files each containing content for only one layer (base or version content).


