In our SGML DTD, a DITA topic corresponds roughly to a division element.

在我们的SGML DTD中，DITA主题大致对应division元素。

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A direct transplant from SGML, the DTD is too limited for many applications.

DTD直接移植自sgml，对很多应用程序来说功能太有限。

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If, however, you will also be dealing with SGML, the DTD you are using will probably reference its own declaration.

然而，如果您还将处理SGML，则正在使用的DTD将可能引用其自身的声明。

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