PTL文件如何创建，该文件记录了哪些信息?

文件类型：Rational Rose Petal File
扩展名为.ptl的文件是一个开发文件。
文件说明：
ASCII
text-based file format exported from Rational Rose, a model-based
software development program; consists of nested levels enclosed in
parentheses that form a tree of
nodes..ptl
打开.ptl文件
Windows
IBM Rational Rose development software　
LinuxIBM Rational Rose development software