Hi Mark, thanks for you response. The pk is exactly what i am after in the details tab. The solution is somewhat as below. Combinations in both directions are possible. So from main level 101 has three options to choose, the first being 301. However other way around 301 has three options to the main level making a direct lookup impossible. Ideally i would like to show the pk Main screen as variable or something (?) and use in that value in the detail screen. Does this explanation make sense?
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