1. A processor-readable medium storing code representing instructions to cause a processor to perform a process, the code comprising code to: receive an identifier of a first object instance; access an expression including a first textual object element identifier and a second textual object element identifier; request access to a first object element at the first object instance based on the identifier of the first object instance and the first textual object element identifier; receive an identifier of a second object instance in response to the request for access to the first object element; and request access to a second object element at the second object instance based on the identifier of the second object instance and the second textual object element identifier.