Hello, Karl Williamson <[email protected]> wrote: |The FAQ http://www.unicode.org/faq/private_use.html#sentinels |says that the last 2 code points on the planes except BMP were made |noncharacters in TUS 3.1. DerivedAge.txt gives 2.0 for these.
The (nothing but informational except for @missing lines) comments in DerivedAge.txt state very clearly: # - The supplementary private use code points and the non-character code points # were assigned in version 2.0, but not specifically listed in the UCD # until versions 3.0 and 3.1 respectively. |"The conformance wording about U+FFFE and U+FFFF changed somewhat in |Unicode 2.0, but these were still the only two code points with this |unique status" | |Unicode 3.1 [2001] was the watershed for the development of |noncharacters in the standard. Unicode 3.1 was the first version to add |supplementary characters to the standard. As a result, it also had to |come to grips with the fact the ISO/IEC 10646-2:2001 had reserved the |last two code points for every plane as "not a character" Less scattering of information would be a pretty cool thing nonetheless. I.e., i think it would be less academical but much nicer if no FAQ would be necessary at all because the standard as such covers background information, too. I remember that one of the reasons i stopped any effort to go with (the about 120 German Mark book of) Unicode 3.0 was that i was incapable to wrap my head around a combining arabic example somewhere; you need access to technical reports to get it done. --steffen _______________________________________________ Unicode mailing list [email protected] http://unicode.org/mailman/listinfo/unicode
