What does './models_path_all.json' mean?

Hello, thank you for your great work in open-source Blender rendering scripts. I am curious about the meaning of './models_path_all.json'. What is the difference between this json and material3d.json?
```bash
python rendering_scripts/distributed_render.py \
--timeout 3600 \
--num_gpus 8 \
--workers_per_gpu 12 \
--input_models_path './models_path_all.json' \
--resolution 512 \
--render_space 'VIEW'
```
Thank you!