Specification for XID_Start and XID_Continue

From: Martin v. L÷wis (martin@v.loewis.de)
Date: Tue Aug 14 2007 - 11:50:20 CDT

  • Next message: Mike: "Re: Specification for XID_Start and XID_Continue"

    I'm trying to locate the precise specification for the
    XID_Start and XID_Continue properties. According to


    they are derived properties, so there should be an
    algorithm somewhere describing how the are computed
    (given other properties). The UCD says that the
    specification is in UAX#31, which says I should


    However, looking at 5.1, I cannot find a precise
    specification of these properties. For example,
    5.1.2 says "Certain characters...", but does not
    seem to provide a complete list of such characters.
    It ends with "In particular, the following four
    characters...". Again, that reads like an example -
    is it meant as a complete specification?

    Likewise, 5.1.3 talks about "certain Arabic presentation
    forms", without giving a complete list which precisely
    are excluded from XID_Start and XID_Continue.

    Any insights appreciated,


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