This figure shows a simplified view of the Oracle Fusion Middleware directory structure. The top level is MW_HOME. Then:
Install_type, such as WebTier, which contains instances, then Instance_home, which contains:
config, which contain the subdirectory component_type
diagnostics, which contains the subdirectory logs, then component_name
jdk
jrockit
logs
modules
oracle_common
Oracle home, which contains the following directories:
bin
common
user_projects, which contains the following directories
domains, which contains the subdirectories domain_name, then servers, then server_name
utils
wlserver_x