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.

New online texts (February-March 2021)

Ptolemy, Almagesti, tr. Sicily c. 1150 (A.1.1), by Colette Dufossé: https://ptolemaeus.badw.de/ms/227/327/transcription/1

Ptolemy, Hypotheses planetarum, tr. Matthias Bergius (A.3.1), by Elisa Rubino: https://ptolemaeus.badw.de/ms/467/644/transcription/1

Ptolemy, Liber de Analemmate, tr. William of Moerbeke (A.5.1), by Elisa Rubino: https://ptolemaeus.badw.de/ms/228/328/transcription/1

Geber, Liber super Almagesti (C.1.2), by Lenka Jiroušková: https://ptolemaeus.badw.de/print/73/91/transcription/1

Book IV of Ptolemy, al-Majisṭī (tr. Isḥāq b. Ḥunayn/Thābit b. Qurra, A.1.2), from the manuscript Tunis, Dār al-kutub al-waṭaniyya, 7116, by Pouyan Rezvani: http://ptolemaeus.badw.de/ms/669/971/transcription/4#IV