GWSW Ontologie
| Naam | Horizontaal (EN)  |
Horizontal (EN)  |
| URI | DABcb |
| Codering | B |
| Is type | Orientation of the fissure (manhole) (coll) |
| Orientation lining (manhole) (coll) | |
| Orientation of the weld failure (manhole) (coll) |