Is there any documentation for these nodes ? What are they ? Why should I care ?
are nodes that allow to exploit the smart city API of Km4City. https://www.km4city.org
whcih is a totally open source platform for smart city.
the smart city API are documented in the mentioned portal
and also in swagger: https://www.km4city.org/swagger/external/
I cannot put more than two links in the post
the classic doc per node is into the package