The arrow-direction data type
The arrow-direction type represents the direction in which an arrow points, using Unicode arrow terminology.
Allowed values
Base type:xs:string
| left |  |
| up |  |
| right |  |
| down |  |
| northwest |  |
| northeast |  |
| southeast |  |
| southwest |  |
| left right |  |
| up down |  |
| northwest southeast |  |
| northeast southwest |  |
| other | Another direction besides one of those listed. |