To distinguish FactMiners agenda from that of others, let's clearly distinguish these two these terms; metadata and metamodel. Wikipedia interestingly, and I think appropriately, redirects the term 'metamodel' to the page/term 'Metamodeling' which subtly suggests the active and transitional nature of metamodeling as a preparatory step in service to a further goal. That is, we metamodel as a way to gain leverage in subsequent modeling and development activity.