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.

Isaac Argyros, 〈Paraphrasis in Anonymum commentum in Quadripartitum〉

Madrid, UC-BH, cod. 122 · 5v

Facsimile

Quod autem non absque aliqua occasione, haud tamen decenter calumniam hec ars subiit quod foret impossibilis, sic quidem cognoscemus. Primum enim illorum errata qui non exacte hoc opus pertractant, que ut a permulta sunt ut in magna et multarum partium contemplatione opinionem fecit ut hi etiam qui vera dicunt fortuito id facere viderentur atque id quid haud recte.