At the top of this diagram, a box labeled Middle-Tier Instance has two arrows pointing downwards. The left arrow points to a database labeled Metadata Repository asdb1.myco.com. This database is shown to contain Product Metadata. The right arrow points down into a large box labeled Identity Management. The Identity Management box contains DAS, DIP, SSO Server, and OID Server. The Metadata Repository asdb1.myco.com has an arrow pointing to the Identity Management box. The SSO Server has an arrow pointing to the OID Server. Below the Identity Management box is another Metadata Repository, which is shown to contain Single Sign-On Schema and OID Schema. The SSO Server in the Identity Management box has an arrow pointing to the Single Sign-On Schema, and the OID Server in the Identity Management box points to the OID Schema.