xsd:any和xsd:anyType之间的差异/相似之处

I am reading about XML, XML-Schema, DTD and I don't really understand the difference between xsd:any and xsd:anyType.

我正在阅读关于XML、XML- schema、DTD的文章，我并没有真正理解xsd:any和xsd:anyType之间的区别。

Can someone explain this to me or point to some good article? (please don't link to the XML-Schema specifications - I read that and I'm more confused)

有人能给我解释一下吗?(请不要链接到xml模式规范——我读了这个，我更糊涂了)

TIA

蒂雅

2 个解决方案

#1

This post explains it nicely. I quote:

这篇文章很好地解释了这一点。我引用:

xsd:anyType is a type, like xsd:integer (though xsd:anyType is special in that it can act as a simple or complex type, and it places essentially no restrictions on the tree that it validates -- think of it loosely as the Schema language's analog of java.lang.Object).

任何类型都是一种类型，如xsd:integer(尽管xsd:anyType是特殊的，因为它可以作为一个简单或复杂的类型，并且它对它所验证的树基本上没有限制——可以把它松散地看作是模式语言的java.lang.Object的模拟)。

A sample use would be:

样本的使用情况如下:

<xsd:element name="e" type="xsd:anyType"/>

This would mean that elements named <e> can have any content, any attributes, etc.

这意味着命名为 的元素可以有任何内容、任何属性等等。

xs:any is a wildcard, usable as a term in a content model. For example:

xs:any是通配符，可用作内容模型中的术语。例如:

<xsd:complexType name="T">
  <xsd:sequence>
    <xsd:element ref="A"/>
    <xsd:any />
    <xsd:element ref="C"/>
  </xsd:sequence>
</xsd:complexType>

Elements of type T must have content <A/><???/><C/>, where <???> can be any named element. Now, if you look really closely there is an approximation to the definition of xsd:anyType given for reference in the Recommendation, and it uses an xsd:any wildcard as the means of saying that it allows any elements.

类型T的元素必须具有内容 < C / >,< ? ? ?>可以是任何命名元素。现在，如果您仔细观察，就会发现xsd:any类型的定义有一个近似值，它使用xsd:any通配符来表示它允许任何元素。

Also take a look at the XML Schema.

还要看一下XML模式。

#2

The mailing list post linked in dogbane's answer wasn't clear to me until I created the following example:

在我创建了以下示例之前，我不太清楚dogbane答案中链接的邮件列表。

With anyType schema:

anyType模式:

<xsd:complexType name="Outer">
    <xsd:element name="e" type="xsd:anyType" />
</xsd:complexType>

Which allows this format:

它允许这种格式:

<Outer>
    <e> // must be called "e"
        // but anything can go inside
    </e>
</Outer>

And with any schema:

和任何模式:

<xsd:complexType name="Outer">
    <xsd:any />
</xsd:complexType>

Which allows this format:

它允许这种格式:

<Outer>
    //anything can go inside
</Outer>

So anyType is a type, and any is an element

任何类型都是类型，任何类型都是元素