These metacodes allow the observer to understand other codes. Metacodes in turn are modeled by meta-metamodels . Concepts are abstract. They're physically represented with models . To determine which concept a model represents, known as decoding the model, the observer uses a code .
Codes are concepts.
They're physically represented with metamodels . To decode a metamodel, the observer uses a metacode . Metacodes are concepts. They're physically represented with meta-metamodels . But in practice, metacodes and meta-metamodels seem to be as much as we need.