Methods and apparatus are disclosed for notifying one or more users of information having a plurality of attributes. A plurality of subscribable objects are provided to one or more users, where each subscribable object comprises one or more attributes as required attributes and zero or more of the attributes as optional attributes. Subscription requests are received from one or more of the users based on at least one of the subscribable objects. The subscribable objects are based, for example, on a set of predefined templates. The predefined templates identify each of the plurality of attributes as a required attribute or an optional attribute. Each of the attributes is presented to a user using a display format selected based on a cardinality of the corresponding attribute.