Scarlatti sonatas unusual notehead

[JSB]

Hello All, my first post: I would like to know what the name of the unusual note head is that is featured all throughout the digital typreset Scarlatti sonatas- a small handwritten kind of note. I have not seen this before in modern editions of anyones music, and I cannot see a musical reason for it, given that it is piano music. It is also more than a little difficult to read and distracting. I am just trying to get my head around why these would be included. I assume Scarlatti wrote these in himself, as the typresetter has gone to great pains to notate 500+ sonatas. But still I find it too distracting, and just for the sake of purity, I feel it is a step too far, unless there is a distinct reason, such us detaiing specific phrases etc.. But I can't see any method or continuity in their usages. Much thanks all the same for perservering with the typesetting task all the same!
Best Wishes

[coulonnus]

Sorry to repeat myself, but could you please post an URL where you found such a retypeset Scarlatti sonata? I guess you mean one typeset by John Sankey, e.g. Sonata K 103 here: http://imslp.org/wiki/Keyboard_Sonatas, ... _Domenico)

The funny note heads denote the hand assignments. http://web.ncf.ca/bf250/scarlattimus.html

[JSB]

Hi, yes, that's the one, and yes I finally found where he has written the hand assignments. I don't see where you were repeating yourself, but appology accepted, all the same.
Did D. Scarlatti provide these hand assignments himself? I am yet to find such on the net. Thanks again

[coulonnus]

I assume Scarlatti wrote these in himself, as the typresetter has gone to great pains to notate 500+ sonatas.

This typesetter didn't notate more than 176 sonatas. http://web.ncf.ca/bf250/scarlatti/index.html