Hi Jarrett,
First thanks for your reply.
I didn't think it was a java convention, its not something I have ever seen in it.
By "standard" you mean for 10.x (I assume, I have not looked at 10.1, only 10.2). I was just curious as to why it was introduced. They do not appear to be auto-generated in any way, they seem to be very deliberate classes in their own right - with the non-underscored equivalent class as a subsclass in every case I have seen. Their content is also distinct from said underscore-less classes.
However, if theres nothing special about them, I'll continue to use them if need be.
Regards,
Toby