Dear Dynamo intelligentsia…-I’m trying to flatter you, can you feel it+ 
Let me describe my initial challenge, shortly:
/explanation start
I need to extract quantities per building, and i’ve decided to go with Phases, so i’m giving every object in a building the same phase, and i can extract quantities from that phase.
As we keep editing the project, i need to quickly assign phases to all the objects in each building.
As you may know, it’s not just a matter of selecting a whole building a
Dynamo can assign phases, i got that far. But it has the same problem inherent in Revit: objects of different categories cannot be assigned a phase in the same operation, i need to filter them into categories, and THEN assign phase. No?
/explanation stop
Problem 1:
Can i filter out selected categories from a selection in Dynamo?
Challenge 1: Is there a node that can evaluate, whether an object is within some specified location parameters? Like, can i draw a polygon-shaped box, and Dynamo can return all objects within the box’s boundary? If i had that node, i could make all objects in building xx’s area receive phase xx!
Thanks a lot, in advandd
