Quantum Theory and Special Relativity: when are physical properties attributed jointly to the system and to the context in which it is studied?

Alexia Auff`eves and Philippe Grangier proposed to modify the quantum ontology by requiring that physical properties are attributed jointly to the system and to the context in which it is embedded. Comparing the formal structures of Quantum Theory and of Special Relativity may suggest a basis for such an interpretation of quantum theory.