The discussion of the notches near the tip of these blades intrigues me. Might I offer an entirely mundane possible purpose.  
 
If you were to drop your gloves or your hat while in the saddle, having a long pointed stick with a barb at the end would make retrieving said item much easier. Absent a pointed stick, a sword with a notch at the end of the blade would do the trick.  No need to dismount - simply reach down with your blade, use the hook to snag the item, and be on your merry way.
		 
		
		
		
		
		
		
		
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