Re: Draft Proposal to add Variation Sequences for Latin and Cyrillic letters

Date: Sun Aug 08 2010 - 12:19:57 CDT

  • Next message: António MARTINS-Tuválkin: "Modifiers from punctuation (was: "Re: How to encode reversed section sign?")" wrote:
    > I have compiled a draft proposal:
    > Proposal to add Variation Sequences for Latin and Cyrillic letters

    There are 256 selectors but the proposal only suggests numbering up to 16 effectively deprecating the others. Surely we want all 256?

    The Mongolian selectors alter the appearance of the glyph displayed after the character has been evaluated for position in the word and a series of complex rules applied. The user will normally only have to use the selectors in exceptional cases. The selectors are only valid in certain positional cases and have been somewhat arbitarily assigned. It is not the case that selector 1 selects the same alternative form in all positions.

    A typical user will see most of the variations in use from the built in rules being applied. There is not a user entity which would be considered variant 1 which is used by a separate community. I regard to proposal to give a name like VARIant-M1 as confusing as they have no basis in reality

    I am also have some concerns from a security point of view as the proposal makes variation selectors valid for Latin characters for the first time. The selectors which produce a default behaviour or make one character look like another already encoded seem unneeded and introduce yet more clones of common characters.

    I also have concerns about the proposal to give the non ideographic variants names like VARIANT-1. Surely it is possible to give them descriptive names which would make it easier to understand what is meant? It is not as if we will have thousands of these.

    Some parts of the proposal have merit, but I would urge the UTC to hold a public consultation on the matter to allow more time for feedback to be gathered.

    Tim Partridge

    This archive was generated by hypermail 2.1.5 : Sun Aug 08 2010 - 12:26:18 CDT