Context schema found at
http://docs.oracle.com/cd/E13171_01/alsb/docs21/consolehelp/context.html#1060634

Error codes explained at
 http://download.oracle.com/docs/cd/E13159_01/osb/docs10gr3/consolehelp/errorcodes.html

More
http://docs.oracle.com/cd/E13159_01/osb/docs10gr3/userguide/context.html#wp1051816
