A method for dynamic implementation of a Java Metadata Interface (JMI) to a metamodel includes receiving a JMI implementation request, implementing a package proxy JMI interface when the request is a package proxy request, implementing a class proxy JMI interface when the request is a class proxy request and implementing a class instance JMI interface when the request is a class instance request. The request is associated with a metamodel that includes at least one package. The at least one package includes at least one class. The at least one class includes at least one attribute reference or operation. An apparatus for dynamic implementation of a Java Metadata Interface (JMI) to a metamodel includes a requestor to make a JMI implementation request, a package proxy implementor to implement a package proxy JMI interface when the request is a package proxy request, a class proxy implementor to implement a class proxy JMI interface when the request is a class proxy request and a class instance implementor to implement a class instance JMI interface when the request is a class instance request.