An OracleAS 10.1.2 ORACLE_HOME that was used in previous 12.x releases.
An Oracle Fusion Middleware (FMW) ORACLE_HOME that supports Oracle WebLogic Server (WLS) and supersedes the Java (OracleAS 10.1.3) ORACLE_HOME that was used in previous releases.
The use of these two ORACLE_HOMEs enables Oracle E-Business Suite to take advantage of the latest Oracle technologies.
study this document so you have clear idea
Oracle E-Business Suite Concepts E22949-09
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