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Asked: 2026-05-10T21:33:59+00:00

I would like to create XML Schema for this chunk of xml, I would

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I would like to create XML Schema for this chunk of xml, I would like to restrict the values of ‘name’ attribute, so that in output document on and only one instance of day is allowed for each week day:

<a>   <day name='monday' />   <day name='tuesday' />   <day name='wednesday' /> </a>

I have tried to use this:

 <xs:complexType name='a'>   <xs:sequence>     <xs:element name='day' minOccurs='1' maxOccurs='1'>       <xs:complexType>         <xs:attribute name='name' use='required'>           <xs:simpleType>             <xs:restriction base='xs:string'>               <xs:enumeration value='monday' />             </xs:restriction>           </xs:simpleType>         </xs:attribute>       </xs:complexType>     </xs:element>     <xs:element name='day' minOccurs='1' maxOccurs='1'>       <xs:complexType>         <xs:attribute name='name' use='required'>           <xs:simpleType>             <xs:restriction base='xs:string'>               <xs:enumeration value='tuesday' />             </xs:restriction>           </xs:simpleType>         </xs:attribute>       </xs:complexType>     </xs:element>   </xs:sequence> </xs:complexType>

but XML Schema validator in eclipse says error ‘Multiple elements with name ‘day’, with different types, appear in the model group.’.

Is there any other way?

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1 Answer

  1. You need something like this:

    <?xml version='1.0' encoding='UTF-8'?> <xs:schema xmlns:xs='http://www.w3.org/2001/XMLSchema' elementFormDefault='qualified'>   <xs:element name='a'>     <xs:complexType>       <xs:sequence>         <xs:element maxOccurs='unbounded' ref='day'/>       </xs:sequence>     </xs:complexType>   </xs:element>   <xs:element name='day'>     <xs:complexType>       <xs:attribute name='name' use='required'>         <xs:simpleType>             <xs:restriction base='xs:string'>                 <xs:enumeration value='monday'/>                 <xs:enumeration value='tuesday'/>                 <xs:enumeration value='wednesday'/>             </xs:restriction>         </xs:simpleType>         </xs:attribute>     </xs:complexType>   </xs:element> </xs:schema>
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