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