PAL

Ptolemaeus Arabus et Latinus

_ (the underscore) is the placeholder for exactly one character.
% (the percent sign) is the placeholder for no, one or more than one character.
%% (two percent signs) is the placeholder for no, one or more than one character, but not for blank space (so that a search ends at word boundaries).

At the beginning and at the end, these placeholders are superfluous.

ὑπὲρ κεφαλῆς‘overhead direction’

Greek

References: Alm. Heiberg: I.7, 23:8
Translated into:
Arabic: على الرؤوس [Alm. MS Tunis: ]
Arabic: علا رؤوسنا [Alm. MS Leiden: f. 5r]
Modern translations:
English: overhead direction [Alm. Toomer: 44]