xml约束

1、挑选你熟悉省份，制作xml城市列表 ----- 必备城市基本信息 10个城市 --- 一定要有属性
2、对城市列表 添加DTD约束
3、选作：对城市列表添加Schema约束

province-dtd.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE provinces SYSTEM "province.dtd">
<provinces>
    <province>
        <city>
            <country>
                <name>睢县</name>
                <address>North</address>
            </country>
            <country>
                <name>柘城</name>
                <address>North</address>
            </country>
            <name>商丘</name>
            <zipcode>476900</zipcode>
        </city>

        <city>
            <country>
                <name>杞县</name>
                <address>North</address>
            </country>
            <country>
                <name>兰考</name>
                <address>North</address>
            </country>
            <name>开封</name>
            <zipcode>476500</zipcode>
        </city>

        <city>
            <country>
                <name>登封市</name>
                <address>North</address>
            </country>
            <country>
                <name>中牟县</name>
                <address>North</address>
            </country>
            <name>郑州市</name>
            <zipcode>450000</zipcode>
        </city>

        <city>
            <country>
                <name>封丘市</name>
                <address>North</address>
            </country>
            <country>
                <name>长垣县</name>
                <address>North</address>
            </country>
            <name>新乡市</name>
            <zipcode>453000</zipcode>
        </city>

        <city>
            <country>
                <name>灵宝市</name>
                <address>North</address>
            </country>
            <country>
                <name>义马市</name>
                <address>North</address>
            </country>
            <name>三门峡市</name>
            <zipcode>472000</zipcode>
        </city>

        <city>
            <country>
                <name>汝阳县</name>
                <address>North</address>
            </country>
            <country>
                <name>嵩县</name>
                <address>North</address>
            </country>
            <name>洛阳市</name>
            <zipcode>471000</zipcode>
        </city>

        <city>
            <country>
                <name>鹿邑县</name>
                <address>North</address>
            </country>
            <country>
                <name>太康县</name>
                <address>North</address>
            </country>
            <name>周口市</name>
            <zipcode>466000</zipcode>
        </city>

        <city>
            <country>
                <name>郏 县</name>
                <address>North</address>
            </country>
            <country>
                <name>鲁山县</name>
                <address>North</address>
            </country>
            <name>平顶山市</name>
            <zipcode>472000</zipcode>
        </city>
    </province>
</provinces>

province.dtd

<?xml version="1.0" encoding="UTF-8"?>
<!ELEMENT provinces (province)>
<!ELEMENT province (city+)>
<!ELEMENT city (country+,name,zipcode)>
<!ELEMENT country (name,address)>
<!ELEMENT name (#PCDATA)>
<!ELEMENT address (#PCDATA)>
<!ELEMENT zipcode (#PCDATA)>

province.xml

<?xml version="1.0" encoding="UTF-8"?>
<provinces xmlns="http://www.huanghuai.edu.cn/provinces"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.huanghuai.edu.cn/provinces province.xsd">
    <province>
        <city name="商丘">
            <country>
                <name>睢县</name>
                <address>North</address>
            </country>
            <country>
                <name>柘城</name>
                <address>North</address>
            </country>
            <zipcode>476900</zipcode>
        </city>
        <city name="开封">
            <country>
                <name>杞县县</name>
                <address>North</address>
            </country>
            <country>
                <name>兰考</name>
                <address>North</address>
            </country>
            <zipcode>476500</zipcode>
        </city>

        <city name="郑州市">
            <country>
                <name>登封市</name>
                <address>450000</address>
            </country>
            <country>
                <name>中牟县</name>
                <address>North</address>
            </country>
            <zipcode>450000</zipcode>
        </city>
        <city name="新乡市">
            <country>
                <name>封丘县</name>
                <address>North</address>
            </country>
            <country>
                <name>长垣县</name>
                <address>North</address>
            </country>
            <zipcode>453000</zipcode>
        </city>
        <city name="三门峡市">
            <country>
                <name>义马市</name>
                <address>North</address>
            </country>
            <country>
                <name>灵宝市</name>
                <address>North</address>
            </country>
            <zipcode>472000</zipcode>
        </city>
        <city name="洛阳市">
            <country>
                <name>嵩县</name>
                <address>North</address>
            </country>
            <country>
                <name>汝阳县</name>
                <address>North</address>
            </country>
            <zipcode>471000</zipcode>
        </city>
        <city name="周口市">
            <country>
                <name>太康县</name>
                <address>North</address>
            </country>
            <country>
                <name>鹿邑县</name>
                <address>North</address>
            </country>
            <zipcode>466000</zipcode>
        </city>
        <city name="平顶山市">
            <country>
                <name>鲁山县</name>
                <address>North</address>
            </country>
            <country>
                <name>郏 县</name>
                <address>North</address>
            </country>
            <zipcode>467000</zipcode>
        </city>
    </province>
</provinces>

province.xsd

<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema" targetNamespace="http://www.huanghuai.edu.cn/provinces"
    xmlns:tns="http://www.huanghuai.edu.cn/provinces" elementFormDefault="qualified">
    <element name="provinces">
        <complexType>
            <sequence>
                <element name="province" minOccurs="0" maxOccurs="unbounded">
                    <complexType>
                        <sequence>
                            <element name="city" minOccurs="0" maxOccurs="unbounded">
                                <complexType>
                                    <sequence>
                                        <element name="country" minOccurs="0" maxOccurs="unbounded">
                                            <complexType>
                                                <sequence>
                                                    <element name="name" type="string"></element>
                                                    <element name="address" type="string"></element>                                                
                                                </sequence>
                                            </complexType>
                                        </element>
                                        <element name="zipcode" type="string"></element>
                                    </sequence>
                                    <attribute name="name" type="string"></attribute>
                                </complexType>
                            </element>
                        </sequence>
                    </complexType>
                </element>
            </sequence>
        </complexType>
    </element>
</schema>