Internal targets should not include description attributes. Internal targets may include targets that perform intermediate processing, such as generating code or creating output directories.
对于一般用来执行中间处理过程的内部任务，比如生成代码或建立输出目录等，就无法使用描述属性。
2
The shared-memory header contains a description of all other structures in Shared memory, including internal tables and the buffer pool.
共享内存头包含共享内存中所有其他结构的描述，包括内部表和缓冲池。
3
In fact, the Application Developer documentation contains the best description of the internal representation of the XMI object model that these files use.