Roles Element (ASSL)
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Contains the collection of Role elements defined under the parent element.
The Roles element associated with a Server element contains only one role, named Administrators, which represents the server administrator role. The server administrator role cannot be changed or deleted, nor can additional roles be added to the collection.
The Roles element associate with a Database element contains the roles defined for that database.
The corresponding element in the Analysis Management Objects (AMO) object model is RoleCollection.