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.

models ‘model’

English

References: PH Hamm: I.1:1, 44:4; I.2:4, 46:10
Translation of:
Greek: ὑπόθεσις [PH Heiberg: I.1:1, 70:3; I.1:4, 70:20; I.2:4, 72:27]