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.

ὑπόμνημα‘note, commentary’

Greek. – Grammar: n.

References: PH Heiberg: I.1:1, 70:4
Translated into:
Arabic: قول [PH Morelon: I.1:1, 15:5]
Modern translations:
English: book [PH Hamm: I.1:1, 44:5]