NOT.5:1 - Problem frame

Use this when work must continue in another notation and you need to construct or repair the translation. A diagram may need a textual form, an ordered performance may need a compact score, or an expression may need a representation accepted by another reader or tool.

Start with the operation the receiving notation must support. Construct its expression from the source’s interpreted parts and connections, then use it to obtain the needed answer. Find a pair of source expressions that the translation would make indistinguishable. If the work needs their difference, retain it, enrich the target or restrict the translation’s use.

The first result is a usable translation with an answer-recovery procedure, or a demonstrated loss and a concrete way to repair it. Recovering a needed answer, reproducing the source expression and carrying a target edit back are different demands; choose the ones the work actually has.

The reader needs the two notations’ formation and interpretation rules, supplied by NOT.2 and NOT.3 where they are missing. Subject knowledge establishes which consequences matter. The examples need directed connections, ordered sequences and elementary arithmetic.

Use an established translation directly when its conditions meet the need. NOT.4 handles transformations within one notation. NOT.6 handles continuing coordination of several representations and their changes. CMP.12 develops an effective translator and its execution-preservation argument when software must perform the translation. A.6.3.RT governs the underlying representation change and the claims it can preserve.