8. A system, comprising: a memory; and a processor programmed to: configure a principal model to facilitate automatic generation of at least one resource for use by a computer-executable application, where the principal model comprises a plurality of classes, references, attributes, and associations between any of the classes; identify at least one model item required for a task that is absent from the principal model; instantiate the absent model item in a decoration model that operates with the principal model to augment operational functionality of the principal model, where the decoration model comprises a class, a reference, and an attribute for any corresponding one of the plurality of classes, references, and attributes of the principal model, where a created reference is associated with a key that contains information about a source attribute and a target attribute of the key in the decoration model; and store both of the models within the memory.
8. A system, comprising: a memory; and a processor programmed to: configure a principal model to facilitate automatic generation of at least one resource for use by a computer-executable application, where the principal model comprises a plurality of classes, references, attributes, and associations between any of the classes; identify at least one model item required for a task that is absent from the principal model; instantiate the absent model item in a decoration model that operates with the principal model to augment operational functionality of the principal model, where the decoration model comprises a class, a reference, and an attribute for any corresponding one of the plurality of classes, references, and attributes of the principal model, where a created reference is associated with a key that contains information about a source attribute and a target attribute of the key in the decoration model; and store both of the models within the memory. 11. The system of claim 8 , where the processor is further programmed to provide read access for a query that is formatted for use with the decoration model and that is not directly operative on the principal model by translating the query for operation on an instance of the principal model.