| METADATA_STRUCTURE_ITEM_NONE | None. | 0 |
| METADATA_STRUCTURE_ITEM_OBJECT_TYPE | Object type. | 1 |
| METADATA_STRUCTURE_ITEM_PROPERTY_DEF | Property def. | 2 |
| METADATA_STRUCTURE_ITEM_OBJECT_CLASS | Class. | 3 |
| METADATA_STRUCTURE_ITEM_WORKFLOW | Workflow. | 4 |
| METADATA_STRUCTURE_ITEM_STATE | State. | 5 |
| METADATA_STRUCTURE_ITEM_NAMED_ACL | Named ACL. | 6 |
| METADATA_STRUCTURE_ITEM_USER | User. | 7 |
| METADATA_STRUCTURE_ITEM_USER_GROUP | User group. | 8 |
| METADATA_STRUCTURE_ITEM_CLASS_GROUP | Class group. | 9 |
| METADATA_STRUCTURE_ITEM_VIEW_DEF | View definition. | 10 |
| METADATA_STRUCTURE_ITEM_LANGUAGE | Language. | 11 |
| METADATA_STRUCTURE_ITEM_ACL | ACL. TODO: Remove ? Permission ? | 12 |
| METADATA_STRUCTURE_ITEM_VALUE_LIST_ITEM | Value list item. | 13 |
| METADATA_STRUCTURE_ITEM_VALUE_LIST | Value list. | 14 |
| METADATA_STRUCTURE_ITEM_EVENT_HANDLER | Vault-specific event handler. | 15 |
| METADATA_STRUCTURE_ITEM_STATE_TRANSITION | State transition. | 16 |
| METADATA_STRUCTURE_ITEM_METADATA_CARD_CONFIGURATION | Metadata card configuration. | 17 |
| METADATA_STRUCTURE_ITEM_ALL | All item types. DO NOT use this for mapping. | 10000 |