This figure shows three valid transitions between configurations during upgrade. For example, one transition begins with Release 2 (9.0.2) middle tier with a 9.0.2 Identity Management and a 9.0.2 Metadata Repository. Identity Management is upgraded to Release 2 (9.0.4), then the middle tier is upgraded to Release 2 (9.0.4). Finally, the Metadata Repository is upgraded to Release 2 (9.0.4). The figure illustrates the compatibility of releases among. different components of a configuration.