Need help before I can ask the right question...

[Hugh Myers]

In Segovia's 'Diatonic Major and Minor Scales', under the notes shown
for a given scale are marks beginning with a number surrounded by
parenthesis followed by a line vaguely parallel to the notes,
concluding with an uptick between a given pair of notes. What is this
called and how might I duplicate it in Lilypond?

--hsm