| Allowed Value | Details | 
|---|---|
| difmap | difference Fourier map | 
| direct | structure-invariant direct methods | 
| disper | anomalous-dispersion techniques | 
| geom | inferred from neighbouring sites | 
| heavy | heavy-atom method | 
| isomor | isomorphous structure methods | 
| vecmap | real-space vector search | 
| Allowed Value | Details | 
|---|---|
| difmap | difference Fourier map | 
| direct | structure-invariant direct methods | 
| disper | anomalous-dispersion techniques | 
| geom | inferred from neighbouring sites | 
| heavy | heavy-atom method | 
| isomor | isomorphous structure methods | 
| vecmap | real-space vector search |