1550 Index Qualifier
Code identifying an index
- Type
 - Identifier (ID)
 - Length
 - Min 1 / Max 2
 - Codes
 | Code | Description | 
|---|
|  1 | Matrix Start - Absolute Reference | 
|  2 | Matrix Start - Relative Reference | 
|  3 | Matrix Continuation - Absolute Reference | 
|  4 | Matrix Continuation - Relative Reference |