NOT.2:4.2 - Make the composition structure recoverable

Choose how a user can determine which parts belong to each construction. Text may use delimiters, indentation or precedence; a diagram may use enclosures, named ports or connections. A notation unfolding in time may use a learned boundary gesture or a segmentation convention. Explain the selected rule where its effect is not already established for the intended reader.

Try a nested construction. Recover the outer operation and its immediate parts, then repeat that reading within each part. This is a useful structural reading for tree-like expressions. When a component is shared or a connection returns to an earlier component, expose its reference or connection instead of pretending that every use is an independent nested copy.

Choose the structural distinctions needed by the operation. Some schemes identify several bracketings or drawings as the same expression. Establish the relevant equivalence before omitting their differences. If alternatives are intentionally unresolved, show that unresolved choice and postpone only the operation that needs it decided.