vertical half-brackets

[Werner LEMBERG]

For piano music it is common to indicate the use of the right hand in
the lower staff with a 'half-bracket' (and vice versa for the upper
staff), see image.

Two questions.

* What's the right term for this 'half-bracket'?

* Has someone coded this already?  I couldn't find code in the LSR.

Thanks in advance for guidance!


    Werner