Docs: no information about 'many hypervisors per compute'

Ironic uses unusual model when one compute (with Ironic driver) creates few hypervisors. This is bit unexpected for people coming from KVM/xen. It is only brefly noted in troubleshooting section (http://docs.openstack.org/developer/ironic/deploy/troubleshooting.html)

I think it should be clearly described somewhere in "Introduction to Ironic" and/or in Getting Started section: http://docs.openstack.org/project-install-guide/baremetal/draft/get_started.html

It should describe:
1. That every ironic node creates a one more hypervisor in nova.
2. All those hypervisors are associated with certain nova-compute service.
3. That each hypervisor independently evaluated against scheduler filters and called 'host' in nova-scheduler logs.
4. That each nova-scheduler's host is identified by pair of nova-compute hostname and ironic node uuid. F.e. (bare-compute1, 37522db5-298c-41c4-9e6b-88382698a843)