DMN17 — Can the same Definitions/namespace be used by more than one model?

Please clarify if it is possible to have multiple models on the same namespace. For instance:

<definitions namespace="http://my.company/financeModels" name="Model A" ...

<definitions namespace="http://my.company/financeModels" name="Model B" ...

The current text of the specification does not say anything explicitly one way or another, so please clarify that.

In addition to this, if multiple models can use the same namespace, then the <import> element will require an additional attribute (for instance: modelName) in order to uniquely identify which model should be imported.