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First Public Working Draft: Rules for Simple Placement of Japanese Ruby

June 9th, 2020

The Internationalization Working Group has published a First Public Working Draft of Rules for Simple Placement of Japanese Ruby. This document provides a simple set of rules for placement of Ruby text in Japanese typography that can be used as a minimum baseline for implementers and specification writers. It was developed by the JLReq (Japanese Layout) Task Force as a companion to Requirements for Japanese Text Layout 日本語組版処理の要件(日本語版).

Ruby is the name given to the small annotations in Japanese content that are rendered alongside base text, usually to provide a pronunciation guide, but sometimes to provide other information.