a query about entities.def

[Rad Ished]

I was reading the enities.def file that is included with 2.3
It's really good reading for a noob mapper like me, but I am confused by this:

Portal camera. This camera is used to project its view onto a portal surface in the level through the intermediary of a misc_portal_surface entity. Use the "angles" key or target a target_position or info_notnull entity to set the camera's pointing direction.

I thought nexuiz does not support portal cameras if so why is this in the ents def?
Or is it some sort of q3 legacy thing.

Is the entitites def file a good indicator of what does and does not work in Nexuiz?

[TVR]

No, it's just that tZork and Tymo weren't very thorough when they modified the Q3 entities.def for use in Nexuiz.

Yes portal cameras are impressive, I hope that they, along with other more interactive features [triggerable trains!] will be implemented in Nexuiz.