Where can I find documentation on how to customize a node?

[bigghhz]

There seems to be no documentation on how to customize nodes? Where can I find instructions for node definitions? For example, the data type of the port, the meaning and definition of each default function, etc. It is a bit difficult to understand by reading the implementation in pyflowbase.

[pedroCabrera]

Yes I know it's lacking a bit of documentation, I would suggest looking at the opencv package inmy profile, there it implements different stuff and uses some "advanced" features, I hope some day a better documentation can be write but I don't have many time for it sadly.