SQL*Methods & Detail Design

I'm looking into ways to implement/document a SQL*Form during a formal design phase.
According to SQL*Methods, we use functional models, DFD, and ER models to document the system. However, I think these methods are more preliminary design. I would like a way of doing a detail design like structure charts in a 3GL, but for SQL*Forms. I had no luck yet trying to model a form using structure charts (Jacksons or Jones methods). What do you use? How do you approach it? Can it be done this way or maybe using a real-time type of design work best? Any ideas?

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