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Ruby and Vertical Layout on the Web : Implementation and Background

Bibliographic Information

Other Title
  • ルビと縦書きのWebブラウザへの実装とその背景 (情報基礎とアクセス技術(IFAT) Vol.2011-IFAT-102)
  • ルビと縦書きのWebブラウザへの実装とその背景
  • ルビ ト タテガキ ノ Web ブラウザ エ ノ ジッソウ ト ソノ ハイケイ

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近年の Web は様々な印刷物に代わる役割を担う場面が増えており,Web 技術を基盤とする電子書籍規格 EPUB も注目を集めている.そのため,日本語と関連が深いルビと縦書きについて,活発な議論が行われている.本研究では,従来の印刷物と異なる Web の自由度の高さを考慮し,ルビと縦書きを Mozilla Firefox へ実装し,Web 上の組版の向上を目指す.ルビに関しては HTML5 や XHTML,また妥当でないマークアップへ対応し,他ブラウザより詳細なスタイルの指定を可能にした.縦書きに関しては左から右の縦書き,横組みと縦組みの組み合わせ,縦書きの多段組を実装し,その活用についても述べる.加えて,ルビと書字方向選択の W3C 仕様についても考察する.The variety of Web pages has greatly increased in recent years, and the Web is beginning to take over more and more of the roles of printed paper. In particular, the EPUB eBook format, based on HTML and CSS, has attracted much attention recently. Ruby and vertical layout, both used widely in Japanese documents, have been discussed extensively. In this research, we have investigated and implemented ruby and vertical layout in Mozilla Firefox, with the goal of improving typography on the Web. For ruby, our implementation supports HTML5, XHTML, and invalid markup as well as a wide range of styling properties not implemented on other browsers. For vertical layout, we support not only lines ordered from right to left but also from left to right, the combination of horizontal and vertical layouts, as well as multicolumn vertical layout. We also discuss the W3C specifications on ruby and writing-mode.


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