deb-oslo.config/doc/source/namespaces.rst

Choosing group names for configuration options

Applications should use a meaningful name without a prefix. For Oslo libraries, when naming groups for configuration options using the name of the library itself instead of a descriptive name to help avoid collisions. If the library name is namespaced then use '_' as a separator in the group name.

For example, the oslo.log library should use oslo_log as the group name.