BPMN12 — external references in BPMN and DMN

I don?t know if this has come up in the BPMN RTF already? apologies if old news. TThe DMN beta followed BPMN?s external reference scheme of a prefixed ID value, but in the FTF version they changed to it to something like href=?[DMN filepath]#[ID]?. They say that the BPMN way is ?flawed? because it could lead to accidental ID collisions.?? I don?t understand why referencing a physical storage location in lieu of a proper namespace is less ???flawed? but my question is whether BPMN is moving to do it the DMN way.?? Seeing as DMN has specific pointers to BPMN elements, and I would expect some future BPMN to have specific pointers to DMN elements, I don???t see how the two standards could have totally different methods of external reference.