92 - Structure is the arrangement of and relations between the parts or elements of something complex (Oxford Dictionary).
“Common types of structure include hierarchies (a cascade of one-to-many relationships), a networks featuring many-to-many links, or latticeworks featuring connections between components that are neighbors in space” - Wikipedia.
The key idea to understand about structure is that it allows for order, which in turn leads to repeatability. Everything is meaningless without repeatability. Mathematics is the language of patterns, which are themselves are connections that repeat.
Further Research:
- Why Information Grows: The Evolution of Order, from Atoms to Economies
- The Book of Why: The New Science of Cause and Effect
- 20a - Links are explicit navigable connections
- 20b - Hierarchies
- 20c - Networks
- 20d - Latticeworks
- 20e - Patterns