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.

example ‘example’

English

References: Alm. Toomer: 76. – PH Hamm: I.2:5, 46:12
Translation of:
Greek: ὑπόδειγμα [Alm. Heiberg: II.2, 89:19]
Greek: παράδειγμα [PH Heiberg: I.2:5, 74:1]