Diff. IPortalBasicRole Vs IRole

Hello All,

Please tell me what is the difference between

<b><i>com.sap.portal.pcd.pcm.roles.IPortalBasicRole</i></b>

and <b><i>com.sap.security.api.IRole</i></b>.

Is the former meant for Portal Roles and later one for UME ??

Also from where i can get required jar for

com.sap.portal.pcd.pcm.roles.IPortalBasicRole

regards

Santosh