You have to take into account the dreamer. Their associations to things is key to the representation. Also, depending on the person this could be more or less normal or trivial, it really depends on what is normal imagery and activity for the individual. I could have a dream about hunting a white devil across multiple planes of existence, chasing him across several different dream spaces before running into someone that I knew lost in a maze; while they could be having a dream about being in a womb of light and watching pulsating balls of color bounce around, and it could be the same dream. And it was, true story.
It depends on how the individuals brain chooses to represent the common elements in the dream. Think of it like a rose is a rose by any other name but with abstract concepts. If I call a bear a bear and someone calls it an ursus, we both understand it to be the same thing. Likewise, in a dream what I may represent as an elevator moving between floors which are all their own separate universes, someone else my represent as a river, or a beam of white light.