我在顶部有一些带有允许类型列表的xml数据,以及一个引用允许类型的对象和子对象的递归列表类型:
<?xml version="1.0" encoding="UTF-8"?>
<ROOT xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="KEYREF_TEST.xsd">
<ALLOWED_SHAPE_TYPES>
<SHAPE_TYPE>Circle</SHAPE_TYPE>
<SHAPE_TYPE>Triangle</SHAPE_TYPE>
<SHAPE_TYPE>Square</SHAPE_TYPE>
</ALLOWED_SHAPE_TYPES>
<SHAPES>
<SHAPE>
<TYPE>Triangle</TYPE>
<SUB_SHAPES>
<SHAPE>
<TYPE>Circle</TYPE>
<SUB_SHAPES/>
</SHAPE>
<SHAPE>
<TYPE>Square</TYPE>
<SUB_SHAPES>
<SHAPE>
<TYPE>Triangle</TYPE>
<SUB_SHAPES/>
</SHAPE>
</SUB_SHAPES>
</SHAPE>
</SUB_SHAPES>
</SHAPE>
<SHAPE>
<TYPE>Square</TYPE>
<SUB_SHAPES/>
</SHAPE>
</SHAPES>
</ROOT>
我已经定义了验证此文档的模式,如下所示:
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="ROOT">
<xs:complexType>
<xs:sequence>
<xs:element name="ALLOWED_SHAPE_TYPES">
<xs:complexType>
<xs:sequence minOccurs="0" maxOccurs="unbounded">
<xs:element name="SHAPE_TYPE" type="xs:string"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="SHAPES" type="shape-list-type"/>
</xs:sequence>
</xs:complexType>
<xs:unique name="SHAPE_TYPE_UK">
<xs:selector xpath="ALLOWED_SHAPE_TYPES/SHAPE_TYPE"/>
<xs:field xpath="."/>
</xs:unique>
</xs:element>
<xs:complexType name="shape-list-type">
<xs:sequence>
<xs:element name="SHAPE" minOccurs="0" maxOccurs="unbounded">
<xs:complexType>
<xs:sequence>
<xs:element name="TYPE" type="xs:string">
<xs:keyref name="SHAPE_TYPE_FK" refer="SHAPE_TYPE_UK">
<xs:selector xpath="."></xs:selector>
<xs:field xpath="."></xs:field>
</xs:keyref>
</xs:element>
<xs:element name="SUB_SHAPES" type="shape-list-type"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:schema>
在oXygen 13.2中验证时,我收到以下错误:
System ID: C:\pvcswork\CodeSource\XMLSchema\KEYREF_DATA.xml
Main validation file: C:\pvcswork\CodeSource\XMLSchema\KEYREF_DATA.xml
Schema: C:\pvcswork\CodeSource\XMLSchema\KEYREF_TEST.xsd
Engine name: Xerces
Severity: error
Description: Identity Constraint error: identity constraint "KeyRef@1df2ead" has a keyref which refers to a key or unique that is out of scope.
Start location: 10:28
我认为这是因为xs:keyref是xs:complexType定义的子代,它不是xs:element的子元素,其中定义了xs:unique。
我可以将xs:keyref移动到ROOT定义中并使用XPath定位TYPE元素,但不允许使用//语法,因此我将丢失递归并且必须为每个级别定义一个新的xs:keyref筑巢。 ** UPDATE - //在XPath开始时被允许,前面有一个点! **
我有错过的解决方案(仍在使用XSD)吗?提前谢谢..
答案 0 :(得分:3)
下面的XSD将是我解决问题的方法。我基本上修复了一些选择器并将它们放在同一级别。
XSD:
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="ROOT">
<xs:complexType>
<xs:sequence>
<xs:element name="ALLOWED_SHAPE_TYPES">
<xs:complexType>
<xs:sequence minOccurs="0" maxOccurs="unbounded">
<xs:element name="SHAPE_TYPE" type="xs:string"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="SHAPES" type="shape-list-type"/>
</xs:sequence>
</xs:complexType>
<xs:unique name="SHAPE_TYPE_UK">
<xs:selector xpath="ALLOWED_SHAPE_TYPES/SHAPE_TYPE"/>
<xs:field xpath="."/>
</xs:unique>
<xs:keyref name="SHAPE_TYPE_FK" refer="SHAPE_TYPE_UK">
<xs:selector xpath=".//SHAPE/TYPE"></xs:selector>
<xs:field xpath="."></xs:field>
</xs:keyref>
</xs:element>
<xs:complexType name="shape-list-type">
<xs:sequence>
<xs:element name="SHAPE" minOccurs="0" maxOccurs="unbounded">
<xs:complexType>
<xs:sequence>
<xs:element name="TYPE" type="xs:string"/>
<xs:element name="SUB_SHAPES" type="shape-list-type"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:schema>