This structure contains standard key types (numeric form). The following enumerators are defined within the scope of the structure key_type.
| none | 0 | No value type. |
| string | 1 | Unicode string. |
| string_expand | 2 | Unicode string (expanded using environment strings). |
| binary | 3 | Free form binary. |
| integer | 4 | Unsigned integer. |
| integer_reverse | 5 | unsigned integer in reverse order. |
| link | 6 | Symbolic link (unicode). |
| multiple_string | 7 | Multiple unicode strings. |
| resource_list | 8 | Resource list (resource map). |
| full_resource_descriptor | 9 | Resource list (hardware description). |
| resource_requirements_list | 10 | Resource requirements list. |