A sketch of the filesystem hierarchy as it is applied on ports being dis- tributed by DarwinPorts:
/${prefix}/ The base of the DarwinPorts filesystem hierarchy. By
default set to "/opt/local/"
bin/ common utilities, programming tools, and appli-
cations
etc/ system configuration files and scripts
games/ useful and semi-frivolous programs
include/ standard C include files
lib/ archive libraries
libexec/ system daemons & system utilities (executed by
other programs)
sbin/ system programs and administration utilities
share/ architecture-independent files
doc/ miscellaneous documentation
examples/ various examples for users and pro-
grammers
info/ GNU Info hypertext system
java/ applications based on Java
locale/ localization files
man/ manual pages
misc/ misc system-wide ASCII text files
var/ multi-purpose log, temporary, transient, and
spool files
db/ misc. automatically generated system-
specific database files
dports/ DarwinPorts runtime data
spool/ directory containing output spool files
log/ misc. system log files
run/ system information files describing
various info about system since it was
booted
/Applications/DarwinPorts/
Native Mac OS X applications
/Library/Frameworks/
Native Mac OS X Library Frameworks