What is the special meaning of the @ sign?
 

I see the @ sign being used and figure it has a special meaning. Tried searching on it but no luck: can't search on a single character string.

It's used in the GTD.URD temlate for the GTD Apointments (calender named @Daily Review, etc.)

Any pointers to some info on that?

I don't think there's any special meaning, but suspect that it may be the author's way of distinguishing user-defined fields, or forcing these fields to sort to the top in the Attributes dialog.

I believe it's the GTD convention for identifying contexts. Maybe someone with David Allen's book can fill us in.

Thanks!
 

That explains why I couldn't find it in the help!