FIELD_USAGE is a fixed lexicon which is used to identify the field usage.
X_FIELD_USAGE is a fixed lexicon with the following values:
| Saved Value | Displayed Value |
|---|---|
| 01 | Form Only |
| 02 | Form and File |
| 03 | File Only |
| 04 | Internal |
| 05 | Footnote In Form |
