Leading sign format strings
| Sub-String Name | Sub-String Value | Positive | Negative |
|---|---|---|---|
| Leading-Sign | "L" + Positive + Negative + Zero(1) -or- |
Req | Req |
| "L" + "[" + Positive + "]" + Negative + Zero(1) -or- |
Opt | Req | |
| "L" + Positive + "[" + Negative + "]" + Zero(1) -or- |
Req | Opt | |
| "L" + Positive + Zero(1) -or- |
Req | - | |
| "L" + Negative + Zero(1) | - | Req |