AFP printing characteristics are defined on a page-by-page basis. Each page of the output may use different AFP printing characteristics.
There are a number of AFP structured fields that can be inserted in-line within the data stream. This insertion turns Category 3 output into Category 4 output. These structured fields are:
Table 1 Category 4 Structured Fields
Field  | 
Description  | 
|---|---|
IDM  | 
Invoke Data Map  | 
IMM  | 
Invoke Medium Map  | 
CTX/PTX  | 
Composed-Text Data/Presentation-Text Data  | 
IPS  | 
Include Page Segment  | 
IPO  | 
Include Page Overlay (PSF version 2)  | 
Parent Topic |