Well first of all, let me say DTP is an awesome framework and I'm
currently investigating building some tooling on it. I recently tried to
save a SQLModel Schema instance into a resource but was quite surprised
when I realized my resource contained only the Schema without it's
"content".
When I gave a look at the sqlmodel.ecore, I realized that there were no
references configured as containment, which is why my Schema content is
not serialized.