An Example showing value of automatic Tate-Chu-Yoko in Japanese text

The JPG
  http://lists.w3.org/Archives/Member/w3c-archive/2011Jun/att-0027/DSCN9304-edited.jpg
shows an article on interest rates from the Kyoto Shimbun on 2 June 2011. The body of this article, set in a vertical writing-mode, has a large amount of numeric data. Numeric values with 2 digits are set in Tate-chu-yoko (TCY) and all other numbers are set using traditional (Chinese) full-width numbers in sequence. In addition, there is a four character Tate-Chu-Yoko , "1.39" in the headline. This latter TCY is wider than the ideographic characters in that headline.

This example shows why it is desirable to  be able to combine text-transform: fullwidth (to cause the traditional numerals to be used) and TCY properties to automatically set the 2 digit instances in TCY. It also shows why the width of a TCY should not be limited (because limiting the width of the TCY to 1em would prevent the use of "1.39" in TCY in the headline).

Steve Zilles