The Formatting rule includes the methods of writing consecutive paragraph or sentences. Just as a paragraph is a collection of sentences unified by a topic sentence and developed by supporting sentences, so too, a chapter very often has a theme that is developed by a skillfully sequenced set of paragraphs. Rashi new of 3 methods of writing consecutive paragraphs
• Cause-effect: The second paragraph is the effect of the first paragraph. The first paragraph is the cause of the second paragraph.
• Contrast: The two paragraphs illustrate contrasting sides of a theem.
• Unified theme: The two or more paragraphs illustrate a common theme. For example a common theme may be illustrated by a sequence of paragraphs each of which exemplifies and illustrates the theme idea.
The above three principles indicate methods for paragraph development into chapters as well as method for sentence development into paragraphs.

We formerly classified paragraph and chapter development under the grammar rule. However we think it more proper to devote the grammar rule to the relation between meaning and form, for example how verb conjugational forms indicates meaning. As indicated above the formatting rule governs use of sequence to indicate climax and paragraph sequencing.

Rashi on Dt21-02:03 explains the sequence in two sentences indicating a cause-effect relationship.
• Dt21-02. Measure from the corpse to the nearby cities, [so that]
• Dt21-03. When you ascertain the city closest to the corpse: The elders of that city will....

Advanced Rashi: Rashi's contribution is to identify the relationship of the two verses as cause-effect, you measure in order to find the closest city. We have indicated this Rashi comment by embedding the bracketed expressions in the translation above. To recap the two verses would be translated as: Measure from the corpse to the nearby cities, [so that] When you ascertain the city closest to the corpse: The elders of that city will....