| CustomXmlPart | Represents a Custom XML Data Storage Part (custom XML data within a package). |
| CustomXmlPartCollection | Represents a Custom XML Data Storage Part (custom XML data within a package). |
| SmartTag | Represents a smart tag. |
| SmartTagCollection | Represents all smart tags in the cell. |
| SmartTagOptions | Represents the options of the smart tag. |
| SmartTagProperty | Represents the property of the cell smart tag. |
| SmartTagPropertyCollection | Represents all properties of cell smart tag. |
| SmartTagSetting | Represents all SmartTagCollection object in the worksheet. |