IMHO some details of Unicode property support seem unspecified:
1) Assumption: *ALL* Unicode properties and all of their aliases should be supported.
E.g. this will also include the derived properties 'Grapheme_Base' and 'Grapheme_Extent' (missing in Perl 5 - obviously a bug in 'unicore').
2) Syntax of non-boolean properties: In Perl 5 e.g. \p{BidiClass:L} # Left-to-Right \p{gc:L} # General category = Letter should be in Perl 6 (thx Moritz' suggestion on #perl6): <isBidiClass(:L)> <isGC(:L)> Helmut Wollmersdorfer