类numeric _ limits是标准命名空间的一部分；它检查基本类型在给定操作系统平台上的属性。

Class numeric_limits is part of the standard namespace; it checks for properties of fundamental types on a given operating system platform.

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soap和xmlns： xsd：它们是标准命名空间的定义，在以后的WSDL文档中被用作指定特定的soap的信息和数据类型。

XMLNS: soap and XMLNS: XSD: These are standard namespace definitions that are used later in the WSDL document for specifying SOAP-specific information as well as data types.

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我们将年份和月份添加到该命名空间，因为这种做法是命名空间版本控制的事实标准。

We add the year and month to the namespace as this is the DE facto standard for versioning of namespaces.

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