How do we deal with not defined attributes in OpenSCENARIO elements

Currently in OpenSCENARIO 1.1 everything what should be simulateable needs to be defined by the scenario creator. OpenSCENARIO 1.1 is definded by it's underlying schema and gives by this a kind of structure. What is currently missing are some default values for entites, actions, conditions, weather etc. Moreover we need to rethink about the influence on the runtime.

The final goal is to enable abstract and concrete scenarions and align OpenSCENARIO 1.1 and OpenSCENARIO 2.0.