Oracle WebCenter Spaces - Database Identity Store

We are planning to use Web Center Spaces for migrating one of our internal application which is used for Document Collaboration. We have a requirement where we need to have Database as the Identity Store. That means we need our Users and Roles to be configured in the Database. Can we use Database as the Identity store with Spaces Application ?

 

We also want to use SSO CA Siteminder for User Authentication. Can we also integrate Spaces with CA Siteminder for SSO ?

 

                Database Version : 11g Release 2 (11.2.0.1)

                Oracle WebCenter Portal : 11g R1 (11.1.1.6.0)

Thanks...

Roshan