Apparent discrepanccy between FAQ and Age.txt
public at khwilliamson.com
Tue Jun 10 11:22:22 CDT 2014
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 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
Unicode 3.1  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"
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