6.0 beta 2 (build 652) applescript questions

[Greg Satz]

I am playing with writing some applescript C code and am looking at  
the procedures to download data from the latest XTension. Is the 6.0  
beta 2 (build 652) the latest?

There are various anomalies that work for some elements but not  
others. For example "count every xInterface" returns the number of  
interfaces on my system, 2. But "count every xUnit" returns nothing.  
The applescript return data is empty. I assume this is just missing  
code. Also "get name of every xUnit" doesn't appear to be supported  
either.

I am attempting to classify the types of devices that my XTension  
knows about. Short of using groups to do this, I believe I am forced  
to assume that read-only wireless sensors are motion detectors. I am  
sure this is no longer true with the RFXCOM devices.

I am attempting to integrate xPL messages to/from XTension. To best  
do this I need to know that certain devices are lights, motion  
sensors, temperature or humidity sensors. It appears I must use  
groups for this. This would make the integration less reliable as it  
will require manual synchronization between the group lists and  
actual devices.

Is manual grouping my only option?

Thanks,
Greg