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Answwer to Character Properties, Case Mappings & Names FAQ
http://www.unicode.org/forum/viewtopic.php?f=9&t=350
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Author:  Belloc [ Thu Sep 20, 2012 12:17 pm ]
Post subject:  Answwer to Character Properties, Case Mappings & Names FAQ

Didn't understand the answer to the following question in http://www.unicode.org/faq/casemap_charprop.html :

"Why is there no unique uppercase character for ſ — U+017F LATIN SMALL LETTER LONG S (and about one hundred other characters)?
A: There are over 100 lowercase letters in the Unicode Standard that have no direct uppercase equivalent. For example, the uppercase form for long s is an ordinary capital S. ..."

When I look at the UnicodeData.txt file for the character U+017F, I see that the character U+0243 is the Uppercase Mapping for the character U+017F, which is not the ordinary capital S. Could you explain this discrepancy ?

Edit : the Uppercase Mapping to U+017F is U+0053 and it is correct. Sorry for that. But the next question is still valid.

"Why is there no unique uppercase character for ſ — U+017F LATIN SMALL LETTER LONG S?"

Does that mean that the character U+017F has more than one uppercase character ?

Author:  asmus [ Thu Sep 20, 2012 12:36 pm ]
Post subject:  Re: Answwer to Character Properties, Case Mappings & Names F

This is the line from UnicodeData.txt

017F;LATIN SMALL LETTER LONG S;Ll;0;L;<compat> 0073;;;;N;;;0053;;0053

(the 0243 you give is from the next line down.)

0053;;0053 means that this character is mapped to capital 'S', which is not a unique upper case (same uppercase as for small 's').

Not a unique uppercase, in this case, means having an uppercase shared with another character.

Author:  Belloc [ Thu Sep 20, 2012 12:42 pm ]
Post subject:  Re: Answwer to Character Properties, Case Mappings & Names F

Thanks for the answer.

Author:  Belloc [ Thu Sep 20, 2012 12:56 pm ]
Post subject:  Re: Answwer to Character Properties, Case Mappings & Names F

asmus

Do I need to mark the question as answered ? If so, how to do this ? Thanks again.

Author:  asmus [ Thu Sep 20, 2012 1:32 pm ]
Post subject:  Re: Answwer to Character Properties, Case Mappings & Names F

The Unicode Forum doesn't have a formal way to mark questions as answered. Your "thanks" is sufficient.

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