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.

arrangement ‘order’

English

References: PH Hamm: I.1:5, 45:10; I.2:3, 46:5
Translation of:
Greek: τάξις [Alm. Heiberg: I.2, 8:17, 9:1. – PH Heiberg: I.1:5, 70:23; I.2:3, 72:20]
Synonyms:
order[Alm. Toomer: 37]