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Триада: процесс -форма -содержание. 

metanymous в посте Metapractice (оригинал в ЖЖ)

The distinction between content and process is one that many people talk about, but very few pause to think about in any detail. When we communicate with a client, we can use a process intervention or a content intervention, or a single intervention could include both. Each kind of intervention can be useful (or not useful) but they are different, and it is useful to know which kind of intervention you are doing so that you can anticipate the kind of response you are likely to get.
Ну, если уж вникать в деталях в различия между «процессом» и «содержанием», то продуктивнее рассматривать триаду процесс-форма-содержание.