Syntactic structural relation is a reflex in languageofrelations between objects in the world, and it is a kind of abstract grammatical meanings.
句法结构关系是客观事物之间关系在语言中的反映,它是抽象的语法意义。
2
The UML 1.x language is powerful for modeling how classes relate in terms of object-oriented relations such as associations, dependencies, compositions, aggregations and generalizations.