What is the policy on package locations and directory tree?

Are all these necessary under /usr/pkg/?

./dict
./doc
./examples
./misc
./nls
./nls/C
./nls/da_DK.ISO_8859-1
./nls/de_AT.ISO_8859-1
./nls/de_CH.ISO_8859-1
./nls/de_DE.ISO_8859-1
./nls/en_AU.ISO_8859-1
./nls/en_CA.ISO_8859-1
./nls/en_GB.ISO_8859-1
./nls/en_US.ISO_8859-1
./nls/es_ES.ISO_8859-1
./nls/fi_FI.ISO_8859-1
./nls/fr_BE.ISO_8859-1
./nls/fr_CA.ISO_8859-1
./nls/fr_CH.ISO_8859-1
./nls/fr_FR.ISO_8859-1
./nls/hr_HR.ISO_8859-2
./nls/is_IS.ISO_8859-1
./nls/it_CH.ISO_8859-1
./nls/it_IT.ISO_8859-1
./nls/ja_JP.EUC
./nls/ko_KR.EUC
./nls/lt_LN.ASCII
./nls/lt_LN.ISO_8859-1
./nls/lt_LN.ISO_8859-2
./nls/nl_BE.ISO_8859-1
./nls/nl_NL.ISO_8859-1
./nls/no_NO.ISO_8859-1
./nls/pt_PT.ISO_8859-1
./nls/ru_SU.CP866
./nls/ru_SU.KOI8-R
./nls/sv_SE.ISO_8859-1
./skel

Some of the packages, particularly x11/, like to dump themselves in
/usr/X11R6/.  In this case they proceed to create all the directories
listed above under /usr/X11R6.

Definitely makes X11 upgrades difficult.

Regards,
Greg