MED file format specification and group tree definitions


The group ENS_MAA contains data or attributes.
The group ENS_MAA/Mesh_1 contains data or attributes.
The group ENS_MAA/Mesh_1/-0000000000000000001-0000000000000000001 contains data or attributes.
The group ENS_MAA/Mesh_1/-0000000000000000001-0000000000000000001/MAI contains data or attributes.
The group ENS_MAA/Mesh_1/-0000000000000000001-0000000000000000001/MAI/HE8 contains data or attributes.
The dataset ENS_MAA/Mesh_1/-0000000000000000001-0000000000000000001/MAI/HE8/FAM contains data.
The dataset ENS_MAA/Mesh_1/-0000000000000000001-0000000000000000001/MAI/HE8/NOD contains data.
The dataset ENS_MAA/Mesh_1/-0000000000000000001-0000000000000000001/MAI/HE8/NUM contains data.
The group ENS_MAA/Mesh_1/-0000000000000000001-0000000000000000001/MAI/QU4 contains data or attributes.
The dataset ENS_MAA/Mesh_1/-0000000000000000001-0000000000000000001/MAI/QU4/FAM contains data.
The dataset ENS_MAA/Mesh_1/-0000000000000000001-0000000000000000001/MAI/QU4/NOD contains data.
The dataset ENS_MAA/Mesh_1/-0000000000000000001-0000000000000000001/MAI/QU4/NUM contains data.
The group ENS_MAA/Mesh_1/-0000000000000000001-0000000000000000001/MAI/SE2 contains data or attributes.
The dataset ENS_MAA/Mesh_1/-0000000000000000001-0000000000000000001/MAI/SE2/FAM contains data.
The dataset ENS_MAA/Mesh_1/-0000000000000000001-0000000000000000001/MAI/SE2/NOD contains data.
The dataset ENS_MAA/Mesh_1/-0000000000000000001-0000000000000000001/MAI/SE2/NUM contains data.
The group ENS_MAA/Mesh_1/-0000000000000000001-0000000000000000001/NOE contains data or attributes.
The dataset ENS_MAA/Mesh_1/-0000000000000000001-0000000000000000001/NOE/COO contains data.
The dataset ENS_MAA/Mesh_1/-0000000000000000001-0000000000000000001/NOE/FAM contains data.
The dataset ENS_MAA/Mesh_1/-0000000000000000001-0000000000000000001/NOE/NUM contains data.
The group FAS contains data or attributes.
The group FAS/Mesh_1 contains data or attributes.
The group FAS/Mesh_1/FAMILLE_ZERO contains data or attributes.
The group INFOS_GENERALES contains data or attributes.

I have this information about my MED file which is an export of a rectangular cross section beam of a single domain. So far as I know there is the existence of hexahedrons of a single mesh, Mesh_1. What are these different tree items meant to contain? How can I start to make sense out of this? Is there a documentation what all of these many tree branches have contained within them?