@Dave-Allured I don't know enough about the consequences of requiring a specific normalization. There is some [interesting information](http://unicode.org/faq/normalization.html) on the unicode website about normalization. Which suggests that [over 99% of unicode text on the web is already in NFC](http://www.macchiato.com/unicode/nfc-faq#TOC-How-much-text-is-already-NFC-). Also interesting is that combining NFC normalized strings may not result in a new string that is normalized. It is also stated in the FAQ that "Programs should always compare canonical-equivalent Unicode strings as equal", so it's probably not an issue as long as the controlled vocabulary attributes have values with code points in the U+0000 and U+007F range (control chars excluded).
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