7. A method of claim 1 , wherein the (1) data and/or (2) information and/or (3) at least one signal are further based, at least in part, on the following: a generation, a retrieval, or a combination thereof of one or more item models associated with the one or more abstraction levels; and a selection of at least one of the one or more item models for generating the one or more recommendations based, at least in part, on the one or more privacy policies, the one or more security policies, the selected at least one user model, the requested abstraction level, or a combination thereof.
7. A method of claim 1 , wherein the (1) data and/or (2) information and/or (3) at least one signal are further based, at least in part, on the following: a generation, a retrieval, or a combination thereof of one or more item models associated with the one or more abstraction levels; and a selection of at least one of the one or more item models for generating the one or more recommendations based, at least in part, on the one or more privacy policies, the one or more security policies, the selected at least one user model, the requested abstraction level, or a combination thereof. 8. A method of claim 7 , wherein the (1) data and/or (2) information and/or (3) at least one signal are further based, at least in part, on the following: a processing of the selected at least one user model, the selected at least one item model, or a combination thereof to generate ratings data for generating the one or more recommendations.