I am designing a new YAML file, and I want to use the most standard style of naming. Which is it?
Use the standard dictated by the surrounding software.
For example, in my current project the YAML file contains default values for Python attributes. Since the names used in YAML appear in the associated Python API, it is clear that on this particular project, the YAML names should obey the Python
lower_case_with_underscores naming convention.
My next project might have a different prevailing naming convention, in which case I will use that.