xsd 类型=“anySimpleType”对于属性
如果这是一个愚蠢的问题，我很抱歉，到目前为止我还没有真正对 xml 做过任何事情。
我希望能够将一些 xml 反序列化到具有 object 类型属性的类中。此属性可以是 int、guid 或 string。在 xml 中，我希望将此属性定义为属性。我本希望我的 xsd 看起来像这样：
<xsd:complexType name="MyClass">
<xsd:attribute name="MyProperty" type="xsd:anySimpleType" />
</xsd:complexType>
但是，Visual Studio intellisense 没有列出选项“xsd:anySimpleType”。这是智能感知的问题还是我在做一些本质上错误的事情？
Apologies if this is a silly question, I haven't really done anything with xml up until now.
I want to be able to deserialise some xml into a class that has a property of type object. This property could be an int, guid or a string. In the xml I would like this property to be defined as an attribute. I would have expected my xsd to look something like this:
<xsd:complexType name="MyClass">
<xsd:attribute name="MyProperty" type="xsd:anySimpleType" />
</xsd:complexType>
However, visual studio intellisense doesn't list the option, "xsd:anySimpleType". Is this an issue with intellisense or am I doing something inherently wrong?
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尽管拥有 xs:anySimpleType 类型的属性是合法的，但我会避免使用它并改用 xs:string。这是因为该规范留下了许多关于此类属性应如何表现的问题。不可能使用枚举或正则表达式来限制它，如果在身份约束等中使用它，则很难定义会发生什么。验证与 xs:string 完全相同，但行为的其他方面是相当奇怪，并且可能因实现而异。
有人可能会说，如果您稍后想要定义字符串、整数和 URI 等子类型，那么 xs:anySimpleType 是有意义的。但这是我能想到的唯一赞成的情况。
Although it's legal to have an attribute of type xs:anySimpleType, I would avoid it and use xs:string instead. This is because the spec leaves many questions open about how such an attribute should behave. It's not possible to restrict it using an enumeration or a regular expression, it's very poorly defined what happens if you use it in an identity constraint, etc. The validation is exactly the same as for xs:string, but other aspects of the behaviour are fairly weird and likely to vary between implementations.
One could argue that xs:anySimpleType makes sense if you want later to define subtypes such as string, int, and URI. But that's the only case I can think of in favour.
xsd:anySimpleType（和 xsd:anyType）是特殊的所谓 ur-type 定义（前者是简单的 ur-type）；顺便说一句，当谈到 XSD 数据类型时，我总是指出这张图< /a>.
我相信正是由于这种特殊性，这些类型没有出现在 Intellisense 中的部分原因。我想另一个原因也是它是默认分配的类型；换句话说，对于您的属性，如果您不设置类型，则无论如何它都将是anySimpleType。
然而，我也承认这个解释不适用于其他编辑器 - Eclipse 就是其中之一；您可以在 Intellisense 中获得所有这些类型，无需提出任何问题......
The xsd:anySimpleType (and xsd:anyType) are special so-called ur-type definitions (the former being the simple ur-type); incidentally, when it comes to XSD datatypes, I always point out this diagram.
Just being this special, I believe is part of the reason why these types don't show up in Intellisense. I guess another reason is also that it is the type assigned by default; in other words, for your attribute if you do not set the type, it will be anySimpleType regardless.
However, I also admit this explanation doesn't work with other editors - Eclipse being one of them; There you get all these types in Intellisense, no questions asked...