| Name | Value | Description |
| kDefaultBOMStructure | 51969 | The default structure type. |
| kInseparableBOMStructure | 51974 | The inseparable structure type. |
| kNormalBOMStructure | 51970 | The normal structure type. |
| kPhantomBOMStructure | 51971 | The phantom structure type. |
| kPurchasedBOMStructure | 51973 | The purchased structure type. |
| kReferenceBOMStructure | 51972 | The reference structure type. |
| kVariesBOMStructure | 51975 | The structure type varies amongst references. |