| TXMPFiles< tStringObj > | API for access to the main (document-level) metadata in a file |
| TXMPIterator< tStringObj > | API for access to the XMP Toolkit iteration services |
| TXMPMeta< tStringObj > | API for access to the XMP Toolkit core services |
| TXMPUtils< tStringObj > | API for access to the XMP Toolkit utility services |
| XMP_DateTime | The expanded type for a date and time |
| XMP_Error | XMP Toolkit error, associates an error code with a descriptive error string |
| XMP_PacketInfo | XMP packet description |
| XMP_ThumbnailInfo | Thumbnail descriptor |
| XMP_VersionInfo | XMP Toolkit version information |