Shchema keyref et key use

<xs:schema elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="root">
    <xs:complexType>
        <xs:sequence>
            <xs:element name="referenced">
                <xs:complexType>
                    <xs:attribute name="id" type="xs:string" />
                </xs:complexType>
            </xs:element>
          
            <xs:element name="owner">
                <xs:complexType>
                    <xs:attribute name="id" type="xs:string" />
                </xs:complexType>
            </xs:element>
        </xs:sequence>
    </xs:complexType>
   
 	 <xs:key name="aKey">
   	 	 <xs:selector xpath="owner" />
   		 <xs:field xpath="@id" />
	</xs:key>
    <xs:keyref name="aKeyRef" refer="aKey">
        <xs:selector xpath="referenced" />
        <xs:field xpath="@id" />
    </xs:keyref>
</xs:element>

Source: stackoverflow.com

Similar codes

1 vote256 views3 answers
Html iframe full page
Html
0 vote213 views1 answer
Etiquetas formularios html
Html
0 vote274 views1 answer
A column inside another column bootstrap html
Html
1 vote242 views1 answer
Twig keys
Html
2 votes267 views1 answer
Div contenteditable onchange angular
Html
0 vote270 views1 answer
Html peseta symbol
Html
1 vote271 views1 answer
Display object with indentaion in html
Html
1 vote237 views1 answer
Write html inside component angular
Html
0 vote244 views1 answer
My Projects
Html
0 vote257 views1 answer
Inline heading and input
Html