The process of validation checks the XML against a Document Type Definition (DTD), which may be part of the XML or external to it.
确认过程根据文档类型定义(DTD)来检查XML, DTD可以是XML的一部分,也可以在它的外部。
This tutorial lays the groundwork for Part 2, which focuses on information modeling, including the use of namespaces and the definition of Document Type definition (DTD) schemas.
本教程作为第2部分的铺垫,第2部分主要讨论信息建模,包括名称空间的使用和定义文档类型定义(DTD)模式。
The Book type then references the other three as part of its definition as shown in Listing 12.
Book 类型则引用其它三个元素作为其定义的部分,如清单 12 所示。
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