The <anyAttribute> element enables us to extend the XML document with attributes not specified by the schema!
<anyAttribute> 元素能够使我们在XML文档中添加未被schema指定过的属性！

The <anyAttribute> Element
<anyAttribute>元素

The <anyAttribute> element enables us to extend the XML document with attributes not specified by the schema.
<anyAttribute> 元素能够使我们在XML文档中添加未被schema指定过的属性。

The following example is a fragment from an XML schema called "family.xsd". It shows a declaration for the "person" element. By using the <anyAttribute> element we can add any number of attributes to the "person" element:
下面列举了名为 "family.xsd" 的 XML schema 片段。它展示了"person"元素的声明。通过使用<anyAttribute>元素，我们可以给"person"元素添加任意数量的属性。

<xs:element name="person">
 <xs:complexType>
 <xs:sequence>
 <xs:element name="firstname" type="xs:string"/>

 <xs:element name="lastname" type="xs:string"/>
 </xs:sequence>
 <xs:anyAttribute/>
 </xs:complexType>

</xs:element>

Now we want to extend the "person" element with a "gender" attribute. In this case we can do so, even if the author of the schema above never declared any "gender" attribute.
现在，我们希望在"person"元素中添加"gender"属性。虽然这篇schema文件的作者并未声明"gender"属性，但是，我们一样可以做到。

Look at this schema file, called "attribute.xsd":
请看下面这份名为"attribute.xsd"的schema文件：

<?xml version="1.0" encoding="ISO-8859-1"?>

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://www.w3schools.com"
xmlns="http://www.w3schools.com"
elementFormDefault="qualified">

<xs:attribute name="gender">
 <xs:simpleType>

 <xs:restriction base="xs:string">
 <xs:pattern value="male|female"/>
 </xs:restriction>
 </xs:simpleType>
</xs:attribute>

</xs:schema>

The XML file below (called "Myfamily.xml"), uses components from two different schemas; "family.xsd" and "attribute.xsd":
下面的这份名为 "Myfamily.xml" 的 XML文件，使用了来自 "family.xsd" 和 "attribute.xsd" 两篇不同的schema组件：

<?xml version="1.0" encoding="ISO-8859-1"?>

<persons xmlns="http://www.microsoft.com"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:SchemaLocation="http://www.microsoft.com family.xsd
http://www.w3schools.com attribute.xsd">

<person gender="female">
<firstname>Hege</firstname>
<lastname>Refsnes</lastname>

</person>

<person gender="male">
<firstname>Stale</firstname>
<lastname>Refsnes</lastname>
</person>

</persons>

The XML file above is valid because the schema "family.xsd" allows us to add an attribute to the "person" element.
上述XML文件是有效的。因为名为"family.xsd" 的 schema 文件允许我们在"person"元素里添加属性。

The <any> and <anyAttribute> elements are used to make EXTENSIBLE documents! They allow documents to contain additional elements that are not declared in the main XML schema.
<any> 和 <anyAttribute> 元素是用于扩展文档的！它们允许文档中包含未在主体 XML schema 中声明的其它新元素。

XSD <any> 元素 XSD 元素替代

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