If you are doing this for the first time, you need to install the software correctly:
virtualenv -p `python3` --no-site-packages venv/
source venv/bin/activate
pip install -r requirements.txt
If you're coming back to rebuild, be sure to activate the virtual environment again:
source venv/bin/activate
To build the ontology:
invoke build
To build the HHEAR ontology:
invoke buildhhear
To convert an XLSX file (like SDDs or SSDs) from CHEAR to HHEAR, run the following command:
invoke chear2hhear -i <inputfile> -o <outputfile>