CSS Writing Modes Level 4 by World Wide Web Consortium
= CSS Writing Modes Level 4 by World Wide Web Consortium
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https://www.w3.org/TR/2019/CR-css-writing-modes-4-20190730/
Candidate Recommendation, 30 July 2019. Section1 defines writing-mode components; sections2.1,3.2 and5.1 distinguish direction, writing-mode and text-orientation; section6 defines logical dimensions and directions and supplies abstract-to-physical mappings. The wiki examples explicitly stipulate simple unconstrained boxes.