Re: UAX44: loose matching of symbolic values and the `is` prefix

[Asmus Freytag (c)]

On 6/6/2016 9:09 AM, Markus Scherer wrote: Interesting discussion! ICU does not support "is" nor "in" prefixes. I wasn't even aware that UAX #44 loose matching prescribes "is". ICU just implements what Property[Value]Aliases.txt say: # Loose matching should be applied to all property names and property values, with # the exception of String Property values. With loose matching of property names and # values, the case distinctions, whitespace, hyphens, and '_' are ignored. The prefixes seem gratuitous and confusing. For example, if I read UAX44-LM3 right, it would allow [:isscript=isgreek:]. We do support just [:Greek:] for scripts and [:L:] for general categories. I would rather not add support for the prefixes in ICU. markus There is a difference in guaranteeing that "is" is not the leading part of a property value alias and in supporting a match. I agree that requiring (or suggesting) such a thing is questionable. (Esp. in light of what ICU does). However, making sure that those that follow that conventions can continue to do so with future aliases *is* reasonable. A./