Store data with metadata (hdf5)

Idea is to store the data with the metadata in a well defined format.

HDF5 seems to be good.
PyTables (install via tables) uses hdf5 and seems quite useful, but does not define how to store metadata.
PyMoDAQ offers a data management based on hdf5 with definitions for the metadata (e.g. axes for a graph...) and a corresponding plotter, see Data Management.

Proper candidates: