除了DB2以外，IBM并未提供其它实体软件或实现服务。

IBM did not supply either implementation services or substantial software aside from DB2.

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SDDPCM提供软件实体发行文档中固有条目的一个列表、整个替换文件集以及附加脚本。

SDDPCM provides a list of items fixed in the software entity release documentation, full replacement file sets, and additional scripts.

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类提供软件概念和实体的结构，而对象是类的真实的实例。

Classes provide the structure for software concepts or entities, whereas objects are live instances of classes.

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