This section also explains how to use external schemas while you design your own schema.
这一节还解释了在设计您自己的模式时如何使用外部模式。
You'll also learn why and how to develop multiple file schemas, and about using external schemas to design your enterprise data.
您还会学到开发多文件模式的原因与方法，以及使用外部模式来设计企业数据的相关知识。
One notable advantage that comes with XML is the use of namespaces to indicate external schemas developed and refined by other groups.
XML一个值得注意的优点是使用名称空间指明其他团队开发和改进的外部模式。
In addition, you should avoid using a lot of external entities — such as external DTDs or imported XML Schemas — since opening and reading from a file is an expensive operation.
此外，还应避免使用大量的外部实体——例如外部DTD或导入的XML模式，因为打开和读取文件是代价很高的操作。
Multiple versions of J2EE applications could be using different versions of the same external resources, such as database schemas.
不同版本的J2EE应用程序可能会使用相同的外部资源的不同版本，例如数据库结构。
The goal of schema design is to leverage existing schemas as much as possible and to provide external schema changes to build a model of the desired mixed-namespace document.
模式设计的目标是尽可能利用已有的模式，并提供外部模式修改，以建立目标混合名称空间文档的模型。
Also, using commonly defined directory/user schemas would streamline external identity management.
还有，用共通定义的目录或用户定义模式可以帮助外部身份管理。
Also, using commonly defined directory/user schemas would streamline external identity management.
还有，用共通定义的目录或用户定义模式可以帮助外部身份管理。
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