The types of user-defined words are listed below, with the rules that must be followed in forming them.
| Types of User-Defined Words | General Rules |
|---|---|
alphabet-name |
Each word must contain at least one letter. |
|
library-name |
Each word must contain at least one letter. The first 10 characters must form a unique word. |
paragraph-name |
The word need not contain an alphabetic character. |
Level-numbers: 01-49,66,77,88 |
Each word must be a 1- or 2-digit integer; it does not have to be unique. (Segmentation information is syntax checked only.) |
The function of each user-defined word is described in the clause or statement in which it appears.