What are all possible values for the 'Type=' option in a .desktop service file in KDE/Dolphin's?

In application launchers that I have seen is Type=Application, in Dolphin actions (that I can create in ~/.local/share/kservices5) it is Type=Service. Are there other possibilities beside these two for Dolphin and KDE/Plasma 5? The context in which this interests me is that of a more specific question that I have posted at the same time: [How many sub-levels can there be in Dolphin actions/services?](https://unix.stackexchange.com/q/343211/32012) but slso [this](https://elementaryos.stackexchange.com/q/10586/170) on elementaryOS.