The type of editing allowed for an item depends on its data category. The type of editing that is valid for each category is shown below:
| Category | Type of Editing |
|---|---|
| Alphabetic | None |
IBM Extension Boolean End of IBM Extension |
None |
IBM Extension DBCS End of IBM Extension |
None |
IBM Extension National End of IBM Extension |
None |
IBM Extension DBCS-edited End of IBM Extension |
Simple insertion |
| Numeric | None |
| Alphanumeric | None |
| Alphanumeric edited | Simple insertion |
| Numeric edited | All |
IBM Extension External floating-point End of IBM Extension |
Special insertion |