PYI: Language-Based Tools for Programming Environments

研究基于语言的编程工具。基于语言的交互式编辑环境维护有关正在开发的程序的信息数据库。因此，程序员可以询问有关程序的问题或定义不同的观点。程序集成工具允许合并单独更改的程序版本。研究行为的变化，而不是文本的变化，可能会适应更大类别的变化。

Research is conducted on language-based programming tools. Interactive, language-based editing environments maintain a database of information about the program being developed. Thus programmers can ask questions about the program or define different views. Program integration tools permit separately changed versions of a program to be merged. Studying changes in behavior rather than changes in text may permit larger classes of changes to be accommodated.