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Date/Time: Wed Mar 8 14:30:00 CST 2017
Name: Matitiahu Allouche
Report Type: Feedback on an Encoding Proposal
Opt Subject: Missing value in TR50
Section 3.1 "Property values" of TR50 mentions 4 possible values for the Vertical_Orientation property. All these values are either for upright display or for display rotated 90 degrees clockwise. There is no support for counterclockwise rotation. A use case for counterclockwise rotation is for book titles printed sideways on the edge of books in French, which are invariably read from bottom to top, as observed on a few dozens of French books.