MinOccurs 0 和 nillable true [英] MinOccurs 0 and nillable true

问题描述

在我的 wsdl 中有一个元素:

In my wsdl I have an element:

<xsd:element minOccurs="0" name="birthDate" nillable="true" type="xsd:dateTime"/>

我知道 nillable true 允许空值是否意味着它可以允许 xml 空标签?即

I know that the nillable true allows null values does this means that it can allow xml empty tag? i.e

<birthDate/>

推荐答案

设置 nillable="true" 意味着 标签可以如下所示:

Setting nillable="true" means that the <birthDate> tag can appear as follows:

<birthDate xsi:nil="true"/>

但是，由于您还设置了 minOccurs="0"，您也可以完全从 XML 中省略 <birthDate> 标记，它仍然会针对您的 XSD.

However, since you also set minOccurs="0", you could also omit the <birthDate> tag completely from the XML and it would also still validate against your XSD.

请注意，根据 XSD 规则， 或 不被视为 null.

Note that <birthDate/> or <birthDate></birthDate> is not considered null according to XSD rules.

看看 这篇很棒的博文 供进一步阅读.

Have a look at this great blog post for further reading.

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