Continuation and development of the research in Adaptable Programming Initialization [Tod-05.1,2,3] is presented. As continuation of [Tod-05.2,3] in this paper metalinguistic tools used in the process of introduction of new constructions (data, operations, instructions and controls) are...

As continuation of the research results [Tod-05.3] in this paper metalinguistic tools used in the process of introduction of new constructions (data, operations, instructions and controls) are developed. It was done the overview of extensible languages according used extension mechanisms,...