These properties refer to the package locations:
| Property Name | Description |
| OriginalDatabase | Points the path of the current installation package. It can be a location on disk or a location in the Windows Installer cache. |
| ParentOriginalDatabase | Points the path of the main installation package if the current installation process was launched by a MSI Database Relative to Package or MSI Database with Product Code custom action. |
| SourceDir | Points the path of the MSI package folder. |
| TARGETDIR | Points the installation's root destination directory. |