`convert_graph` adds fields not present in the spec
When creating a graph with convert_graph
(as shown in https://workflow.gitlab-pages.esrf.fr/ewokstutorials/ewoksfordevs/#/57), some fields are added to the JSON fields:
In root
directed
multigraph
graph
In schema_version
These are not part of the definition given in https://ewokscore.readthedocs.io/en/latest/definitions.html. For example, ewoksweb
does not support them.
Should we make the spec evolve ?