XML Schema extension 元素
定义和用法
extension 元素对 simpleType 或 complexType 的元素进行扩展。
元素信息
| 出现次数 | 一次 |
| 父元素 | complexContent |
| 内容 | annotation、attribute、attributeGroup、anyAttribute、choice、all、sequence、group |
语法
<extension id=ID base=QName any attributes > (annotation?,((group|all|choice|sequence)?, ((attribute|attributeGroup)*,anyAttribute?))) </extension>
| Mafuta | Maelezo |
|---|---|
| id | Inayotumika. Inasababisha ID ya elementi kina. |
| base | Inayofaa. Inasababisha jina la kipele cha data, simpleType au complexType. |
| xml:lang | Inayotumika. Inasababisha kiwango cha lugha kilichotumiwa kwenye matokeo. |
(Tafuta hizi tafuta katika elementi ya extension, elementi hii inaweza kuonekana mara moja au kila mara, * inataja kwamba elementi hii inaweza kuonekana mara nyingi au kila mara.)
Mfano
Mfano 1
Mfano hizi umeongea kwa kuingia kiwemo kwa kufanya mabadiliko kwa simpleType ya kwanza:
<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:simpleType name="size">
<xs:restriction base="xs:string">
<xs:enumeration value="small" />
<xs:enumeration value="medium" />
<xs:enumeration value="large" />
</xs:restriction>
</xs:simpleType>
<xs:complexType name="jeans">
<xs:simpleContent>
<xs:extension base="size">
<xs:attribute name="sex">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:enumeration value="male" />
<xs:enumeration value="female" />
</xs:restriction>
</xs:simpleType>
</xs:attribute>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
</xs:schema>
Mfano 2
Mfano hizi umeongea kwa kuingia mitatu kwa kufanya mabadiliko kwa elementi ya complexType ya kwanza:
<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="employee" type="fullpersoninfo"/>
<xs:complexType name="personinfo">
<xs:sequence>
<xs:element name="firstname" type="xs:string"/>
<xs:element name="lastname" type="xs:string"/>
</xs:sequence>
</xs:complexType>
<xs:complexType name="fullpersoninfo">
<xs:complexContent>
<xs:extension base="personinfo">
<xs:sequence>
<xs:element name="address" type="xs:string"/>
<xs:element name="city" type="xs:string"/>
<xs:element name="country" type="xs:string"/>
</xs:sequence>
</xs:extension>
</xs:complexContent>
</xs:complexType>
</xs:schema>
