综合（子元素和属性）复杂内容元素

二级子元素的复杂内容元素：
例：
XML文档：
<?xml version="1.0"?>
<books xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="015.xsd">
    <book>
        <id>001</id>
        <name>XML学习天下</name>
        <author>张三</author>
        <author>李四</author>
        <price>88.50</price>
    </book>
    <book>
        <id>002</id>
        <name>XML百例</name>
        <author>张三</author>
        <author>李四</author>
        <author>赵五</author>
        <price>68.00</price>
    </book>
</books>

Schema文档：
<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <xs:element name="books">
        <xs:complexType>
            <xs:sequence>
                <xs:element name="book" maxOccurs="unbounded">
                    <xs:complexType>
                        <xs:sequence>
                            <xs:element name="id" type="xs:integer"/>
                            <xs:element name="name" type="xs:string"/>
                            <xs:element name="author" type="xs:string" maxOccurs="3"/>
                            <xs:element name="price" type="xs:decimal"/>
                        </xs:sequence>
                    </xs:complexType>
                </xs:element>
            </xs:sequence>
        </xs:complexType>
    </xs:element>
</xs:schema>

含有子元素和属性的复杂内容元素：
例：
XML文档：
<?xml version="1.0"?>
<books xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="016.xsd">
    <book id="001">
        <name>XML学习天下</name>
        <author>张三</author>
        <author>李四</author>
        <price>88.50</price>
    </book>
    <book id="002">
        <name>XML百例</name>
        <author>张三</author>
        <author>李四</author>
        <author>赵五</author>
        <price>68.00</price>
    </book>
</books>

Schema文档：
<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <xs:element name="books">
        <xs:complexType>
            <xs:sequence>
                <xs:element name="book" maxOccurs="unbounded">　　/unbounded:不限制，在这里表示不限制book元素的数量
                    <xs:complexType>
                        <xs:sequence>
                            <xs:element name="name" type="xs:string"/>
                            <xs:element name="author" type="xs:string" maxOccurs="3"/>
                            <xs:element name="price" type="xs:decimal"/>
                        </xs:sequence>
                        <xs:attribute name="id" type="xs:integer"/>
                    </xs:complexType>
                </xs:element>
            </xs:sequence>
        </xs:complexType>
    </xs:element>
</xs:schema>

注：该Schema文档结构分明，但层次过多，可以采取引用名称的方法。
上面的Schema文档可改为：
<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <xs:element name="books">
        <xs:complexType>
            <xs:sequence>
                <xs:element name="book" maxOccurs="unbounded" type="book_element">
                </xs:element>
            </xs:sequence>
        </xs:complexType>
    </xs:element>
    <xs:complexType name="book_element">
        <xs:sequence>
            <xs:element name="name" type="xs:string"/>
            <xs:element name="author" type="xs:string" maxOccurs="3"/>
            <xs:element name="price" type="xs:decimal"/>
        </xs:sequence>
        <xs:attribute name="id" type="xs:integer"/>
    </xs:complexType>
</xs:schema>