You reuse the redefine mechanism to avoid modifying the existing core schemas.
可以重用上述的重定义机制以避免修改现有的核心模式。
The any element is probably best utilized by the original core schemas to indicate where the original authors intended to have their schema extended.
any元素可能最好用于最初的核心模式，表明原始作者希望扩展该模式。
Redefines provide a powerful mechanism for defining extensions to existing schemas, but they also illustrate the importance of developing core schemas with extensibility in mind.
重定义为定义已有模式的扩展提供了一种强大的机制，同时也说明了开发具有可扩展性的模式的重要性。
Other approaches can be as simple as modifying existing schemas, although this violates the design goal of reusing core schemas that are not modified from their original sources.
其他方法包括直接修改现有的模式，虽然这样做违背了不修改重用核心模式的设计目标。
W3C XML Schemas have become the core of many business applications because of their powerful data typing and definition capabilities.
由于具有强大的数据输入和定义能力，W3CXMLSchemas已经成为许多商业应用程序的核心。
At a more pragmatic level, tools for working with XML schemas are less mature than those for working with DTDs (especially regarding validation, which is the core issue).
从更实际的角度来说，用于XML模式的工具不如用于DTD的工具来得成熟(特别在确认方面，这是核心问题)。
Core query and event XML schemas.
核心查询和事件XML模式。
The design of topic schemas is the core of making help, because other steps depend on it.
主题大纲的设计是帮助制作的核心，其它步骤以主题大纲为依据。
With XSD schemas it is possible to describe Metadata attached to an XML document, for example using Dublin Core standard.
随着结构描述模式是有可能的描述元数据连接到XML文件，例如使用DublinCore标准。
With XSD schemas it is possible to describe Metadata attached to an XML document, for example using Dublin Core standard.
随着结构描述模式是有可能的描述元数据连接到XML文件，例如使用DublinCore标准。
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