xml_约束_dtd 和 xml_约束_schema()-其他
xml_约束_dtd 和 xml_约束_schema()
分类
DTD:一种简单的约束技术
Schema:一种复杂的约束技术
DTD
引入dtd文档到xml文档中
内部:dtd:将约束规则定义在xml文档中
外部:dtd:将约束规则定义在外部的dtd文件中
本地<!DOCTYPE 根标签 名 SYSTEM “dtd文件的位置”>
网络<!DOCTYPE 根标签 名 PUBLIC “dtd文件名字” “dtd文件的位置url”>
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE students SYSTEM "student.dtd">
<!--<!DOCTYPE students [-->
<!-- <!ELEMENT students (student+) >-->
<!-- <!ELEMENT student (name,age,sex)>-->
<!-- <!ELEMENT name (#PCDATA)>-->
<!-- <!ELEMENT age (#PCDATA)>-->
<!-- <!ELEMENT sex (#PCDATA)>-->
<!-- <!ATTLIST student number ID #REQUIRED>-->
<!-- ]>-->
<students>
<student number="s001">
<name>zhangsan</name>
<age>23</age>
<sex>male</sex>
</student>
<student number="s002">
<name>lisi</name>
<age>24</age>
<sex>female</sex>
</student>
</students>
<!ELEMENT students (student+) >
<!ELEMENT student (name,age,sex)>
<!ELEMENT name (#PCDATA)>
<!ELEMENT age (#PCDATA)>
<!ELEMENT sex (#PCDATA)>
<!ATTLIST student number ID #REQUIRED>
xml_约束_schema
填写xml文档的根元素引入xsi前缀.xmlns:xsi=”http: / / www. w3.org/2001/xNLSchema-instance”引入xsd文件命名空间. xsi:schemaLocation=”http: / /www.itcast.cn/xml student.xsd”
为每一个xsd约束声明一个前缀,作为标识xmlns=”http://www.itcast.cn/xml”
<students xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.itcast.cn/xml" xsi:schemaLocation="http://www.itcast.cn/xml student.xsd">
<?xml version="1.0" encoding="UTF-8" ?>
<students xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://www.itcast.cn/xml"
xsi:schemaLocation="http://www.itcast.cn/xml student.xsd">
<student number="heima_0001">
<name>zhangsan</name>
<age>11</age>
<sex>male</sex>
</student>
<student number="heima_0002">
<name>wangwi</name>
<age>14</age>
<sex>female</sex>
</student>
</students>
<?xml version="1.0"?>
<xsd:schema xmlns="http://www.itcast.cn/xml"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://www.itcast.cn/xml" elementFormDefault="qualified">
<xsd:element name="students" type="studentsType"/>
<xsd:complexType name="studentsType">
<xsd:sequence>
<xsd:element name="student" type="studentType" minOccurs="0" maxOccurs="unbounded"/>
</xsd:sequence>
</xsd:complexType>
<xsd:complexType name="studentType">
<xsd:sequence>
<xsd:element name="name" type="xsd:string"/>
<xsd:element name="age" type="ageType" />
<xsd:element name="sex" type="sexType" />
</xsd:sequence>
<xsd:attribute name="number" type="numberType" use="required"/>
</xsd:complexType>
<xsd:simpleType name="sexType">
<xsd:restriction base="xsd:string">
<xsd:enumeration value="male"/>
<xsd:enumeration value="female"/>
</xsd:restriction>
</xsd:simpleType>
<xsd:simpleType name="ageType">
<xsd:restriction base="xsd:integer">
<xsd:minInclusive value="0"/>
<xsd:maxInclusive value="256"/>
</xsd:restriction>
</xsd:simpleType>
<xsd:simpleType name="numberType">
<xsd:restriction base="xsd:string">
<xsd:pattern value="heima_\d{4}"/>
</xsd:restriction>
</xsd:simpleType>
</xsd:schema>
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分类
DTD:一种简单的约束技术
Schema:一种复杂的约束技术
DTD
引入dtd文档到xml文档中
内部:dtd:将约束规则定义在xml文档中
外部:dtd:将约束规则定义在外部的dtd文件中
本地<!DOCTYPE 根标签 名 SYSTEM “dtd文件的位置”>
网络<!DOCTYPE 根标签 名 PUBLIC “dtd文件名字” “dtd文件的位置url”>
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE students SYSTEM "student.dtd">
<!--<!DOCTYPE students [-->
<!-- <!ELEMENT students (student+) >-->
<!-- <!ELEMENT student (name,age,sex)>-->
<!-- <!ELEMENT name (#PCDATA)>-->
<!-- <!ELEMENT age (#PCDATA)>-->
<!-- <!ELEMENT sex (#PCDATA)>-->
<!-- <!ATTLIST student number ID #REQUIRED>-->
<!-- ]>-->
<students>
<student number="s001">
<name>zhangsan</name>
<age>23</age>
<sex>male</sex>
</student>
<student number="s002">
<name>lisi</name>
<age>24</age>
<sex>female</sex>
</student>
</students>
<!ELEMENT students (student+) >
<!ELEMENT student (name,age,sex)>
<!ELEMENT name (#PCDATA)>
<!ELEMENT age (#PCDATA)>
<!ELEMENT sex (#PCDATA)>
<!ATTLIST student number ID #REQUIRED>
xml_约束_schema
填写xml文档的根元素引入xsi前缀.xmlns:xsi=”http: / / www. w3.org/2001/xNLSchema-instance”引入xsd文件命名空间. xsi:schemaLocation=”http: / /www.itcast.cn/xml student.xsd”
为每一个xsd约束声明一个前缀,作为标识xmlns=”http://www.itcast.cn/xml”
<students xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.itcast.cn/xml" xsi:schemaLocation="http://www.itcast.cn/xml student.xsd">
<?xml version="1.0" encoding="UTF-8" ?>
<students xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://www.itcast.cn/xml"
xsi:schemaLocation="http://www.itcast.cn/xml student.xsd">
<student number="heima_0001">
<name>zhangsan</name>
<age>11</age>
<sex>male</sex>
</student>
<student number="heima_0002">
<name>wangwi</name>
<age>14</age>
<sex>female</sex>
</student>
</students>
<?xml version="1.0"?>
<xsd:schema xmlns="http://www.itcast.cn/xml"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://www.itcast.cn/xml" elementFormDefault="qualified">
<xsd:element name="students" type="studentsType"/>
<xsd:complexType name="studentsType">
<xsd:sequence>
<xsd:element name="student" type="studentType" minOccurs="0" maxOccurs="unbounded"/>
</xsd:sequence>
</xsd:complexType>
<xsd:complexType name="studentType">
<xsd:sequence>
<xsd:element name="name" type="xsd:string"/>
<xsd:element name="age" type="ageType" />
<xsd:element name="sex" type="sexType" />
</xsd:sequence>
<xsd:attribute name="number" type="numberType" use="required"/>
</xsd:complexType>
<xsd:simpleType name="sexType">
<xsd:restriction base="xsd:string">
<xsd:enumeration value="male"/>
<xsd:enumeration value="female"/>
</xsd:restriction>
</xsd:simpleType>
<xsd:simpleType name="ageType">
<xsd:restriction base="xsd:integer">
<xsd:minInclusive value="0"/>
<xsd:maxInclusive value="256"/>
</xsd:restriction>
</xsd:simpleType>
<xsd:simpleType name="numberType">
<xsd:restriction base="xsd:string">
<xsd:pattern value="heima_\d{4}"/>
</xsd:restriction>
</xsd:simpleType>
</xsd:schema>
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