Oracle Universal Installer Concepts Guide - Oracle Documentation

Home Selector (Available on Win32 Platforms)
The following variables are written in this key:
■
■
HOME_COUNTER: Number of Oracle home directories already present on the
system. This counter is a number, exactly 1 higher as the last ID subkey present.
LAST_HOME: ID number of the currently active $ORACLE_HOME
■ IDx: List of registry key's containing the name, number and installation
directory of this ORACLE_HOME. The first installation is written in ID0, the
next one in ID1, etc.
If the Home Selector is started in interactive mode, the registry hive "ALL_HOMES"
is read, including all subkeys, and a dialog box will be displayed with all available
installations. As soon as the you select one, the PATH variable will be adjusted at
the system level.
In order to make batch processing possible, this tool also has a command line
interface, making it possible to use the tool to switch the PATH settings while
executing a series of commands:
ohsel -switch "Oracle Home Name"
The name of this $ORACLE_HOME is one of the names found in the ID subkeys.
Oracle Home Directory Structure for Windows Platform
A typical Oracle home on Windows platforms contains the files and directories
shown in Table 2–1.
Table2–1
Oracle Home Directory
\BIN
\DBS
\PROD1
\PROD2
OracleHomeDirectoryforWindowsPlatforms
Contents
Product executables and DLLs
Common message files
PROD1 product files
PROD2 product files
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