Status: IN
Recursive structures in the GoF catalog receive three independent infrastructure layers built on Composite's uniform tree abstraction: Iterator provides traversal separation, Visitor provides operation extensibility, and Flyweight provides memory efficiency through intrinsic/extrinsic state splitting — a complete infrastructure stack from access through extension to scalability.
The triad handles traversal and operations while Flyweight handles sharing; together they address all three concerns (access, extension, scale) for recursive structures
Depends on (SL): composite-iterator-visitor-recursive-triad, composite-flyweight-scalable-trees