_hub

Configs here shouldn't be used as what Hydra calls a "config group". Configs here serve as a hub for other configs to reference. Most things here usually won't be used in a certain experiment.

For example, the details of each datasets can be defined here, and than I only need to reference the Human3.6M dataset through ${_hub_.datasets.h36m} in other configs.

Each .yaml file here will be loaded separately in base.yaml. Check the base.yaml to understand how it works.