The meta info was at the hearth of the NOMAD Archive, as a way to make the data available. The NOMAD meta info is an extensible language independent and format agnostic description of atomistic simulation data.
Recently I rewrote the tools to manage the meta info in python 3, improved them and generally tried to take advantage of the lesson learned.
pip install meta_into_tools python -m meta_info_tools.meta_tools --help
See the meta info page for more details.