structure-preserving
Technical term used in mathematics, computer science, and linguistics to describe a mapping or transformation that maintains the underlying structure of an object.
This mapping was proven to be structure-preserving.
A structure-preserving transformation does not break the relationships in the original data.
Compound of 構造 (structure) and 保持 (preservation, maintenance). The term is a direct calque from English 'structure-preserving' and is used primarily in technical contexts.