仅当选择了枚举的特定值时,我才需要必需的属性或元素。示例如下:
<xs:element name="TYPE" type="TestEnum" />
<!-- // This Element should only required when TYPE = INTERNATIONAL -->
<xs:element name="IBAN"/>
</xs:complexType>
<xs:simpleType name="TestEnum">
<xs:restriction base="xs:string">
<xs:enumeration value="NATIONAL"/>
<xs:enumeration value="INTERNATIONAL"/>
</xs:restriction>
</xs:simpleType>
答案 0 :(得分:3)
以下是在xs:assert
时使用IBAN
强制TYPE = 'INTERNATIONAL'
的必要性:
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:vc="http://www.w3.org/2007/XMLSchema-versioning"
vc:minVersion="1.1">
<xs:element name="root">
<xs:complexType>
<xs:sequence>
<xs:element name="TYPE" type="TestEnum" />
<!-- // This Element should only required when TYPE = INTERNATIONAL -->
<xs:element name="IBAN" minOccurs="0"/>
</xs:sequence>
<xs:assert test="not(TYPE = 'INTERNATIONAL') or IBAN"/>
</xs:complexType>
</xs:element>
<xs:simpleType name="TestEnum">
<xs:restriction base="xs:string">
<xs:enumeration value="NATIONAL"/>
<xs:enumeration value="INTERNATIONAL"/>
</xs:restriction>
</xs:simpleType>
</xs:schema>