Re: Properties

From: fantasai (
Date: Tue May 17 2011 - 15:04:01 CDT

  • Next message: Ken Whistler: "Re: Properties"

    On 05/17/2011 12:01 PM, Asmus Freytag wrote:
    > The important aspect that was missing in the original request is what effect the status of a script is expected to have in the
    > context of CSS. One thing that Unicode has discovered over the years is that it's nearly impossible to define any character
    > properties that are truly independent of the algorithm(s) that plan to use them. To make the property useful, certain
    > assumptions must be made about how they are used, in some cases, by publishing a single algorithm.
    > Ken's question highlights one possible use of this information. A more detailed presentation of the requirements and how CSS
    > would apply any such classification would help in getting more useful answers.

    I'm looking for this information in order to complete this appendix:

    How this information is used is described at a high level here:
    and in detail in the subsequent sections. The relevant normative bits

       # In vertical typographic modes, any grapheme clusters belonging to a
       # vertical script must be set using its base character's intrinsic
       # orientation. (See Appendix B.) Grapheme clusters belonging to
       # horizontal-only scripts must set sideways (for ‘vertical-right’)
       # or set upright (for ‘upright’) depending on the ‘text-orientation’
       # property.
       # The orientation of characters belonging to the Common, Inherited,
       # and Unknown script categories may be UA- or font-dependent in
       # vertical typographic modes: [details]


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