upward compatible meaning in English

向上兼容，前向兼容
向上兼容的

An object - oriented programming language suited for beginners as well as experienced oo programmers , object rexx is upward compatible with previous versions of classic rexx and provides programming interfaces to existing applications , such as db2 , c , and c applications
Object rexx是一门面向对象的编程语言，适合于初学者和经验丰富oo程序员，它与先前版本的经典rexx向上兼容，并向现有的应用程序，比如db2 、 c和c + +应用程序，提供了编程接口。