This parameter is used to support OAF object types and is usually set to the same directory as JAVA_TOP, but it could point to a different location if that location is on the environment classpath. (Deprecated for R12. OAF files are assumed to be under JAVA_TOP.)
For R12.2, when a custom top is created using adsplice, a new Product's status is not set to 'L'. This parameter keeps track of custom products. Value is a comma separated list of custom products, for example (XXQuest,XXQUEST).