content-type

Hi,
I have been playing with the Services module for a couple of days. According to REST API best practices, the GET URL paths I want to use are:
/buildings
/buildings/4
/buildings/4/rooms
/buildings/4/rooms/5

'Building' and 'room' are both content types, and '4' and '5', the node-ids.

Using the Services module, I can create the following calls:
/node/type=building
/node/4

And with the Services Views module, I can customise the path a little more:
/buildings

But the only way to get a specific building is by:
/buildings?nid=4