XML/XML Schema/fixed

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Версия от 21:22, 25 мая 2010; (обсуждение)
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element fixed value is the restriction value

   <source lang="xml">

File: Data.xml <?xml version="1.0"?> <ElementExamples xmlns="http://www.wbex.ru"

                  xmlns:ex="http://www.wbex.ru"
                  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                  xsi:schemaLocation="http://www.wbex.ru Schema.xsd">
   <aircraft/>                      
   <aircraft>Boeing 747</aircraft>  

</ElementExamples> File: Schema.xsd <?xml version="1.0"?> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"

           targetNamespace="http://www.wbex.ru"
           xmlns="http://www.wbex.ru"
           elementFormDefault="qualified">
   <xsd:element name="ElementExamples">
       <xsd:complexType>
           <xsd:sequence>
               <xsd:element name="aircraft" fixed="Boeing 747" maxOccurs="2">
                   <xsd:simpleType>
                       <xsd:restriction base="xsd:string">
                           <xsd:enumeration value="Boeing 747"/>
                       </xsd:restriction>
                   </xsd:simpleType>
               </xsd:element>
           </xsd:sequence>
       </xsd:complexType>
   </xsd:element>

</xsd:schema>

</source>
   
  


Fixed facets ensure that the minimum value of our minInclusive cannot be modified

   <source lang="xml">

<?xml version="1.0"?> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"

 targetNamespace="http://www.wbex.ru" xmlns="http://www.wbex.ru"
 elementFormDefault="qualified">
 <xs:simpleType name="minInclusive">
   <xs:restriction base="xs:float">
     <xs:minInclusive value="10" fixed="true" />
   </xs:restriction>
 </xs:simpleType>

</xs:schema>

</source>
   
  


fixed value is one of the value in restriction

   <source lang="xml">

File: Data.xml <?xml version="1.0"?> <AttributeExamples xmlns="http://www.wbex.ru"

                  xmlns:i="http://www.wbex.ru"
                  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                  xsi:schemaLocation="http://www.wbex.ru Schema.xsd">
   <image/>                                
   <image i:src="http://www.wbex.ru"/>  

</AttributeExamples> File: Schema.xml <?xml version="1.0"?> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"

           targetNamespace="http://www.wbex.ru"
           xmlns="http://www.wbex.ru"
           elementFormDefault="qualified">
   <xsd:element name="image">
       <xsd:complexType>
           <xsd:attribute ref="src" fixed="http://www.wbex.ru"/>
       </xsd:complexType>
   </xsd:element>
   <xsd:attribute name="src">
       <xsd:simpleType>
           <xsd:restriction base="xsd:anyURI">
               <xsd:enumeration value="http://www.wbex.ru"/>
               <xsd:enumeration value="http://www.wbex.ru/style/logo.png"/>
               <xsd:enumeration value="http://www.wbex.ru/isbn.html"/>
           </xsd:restriction>
       </xsd:simpleType>
   </xsd:attribute>
   <xsd:element name="AttributeExamples">
       <xsd:complexType>
           <xsd:sequence>
               <xsd:element ref="image" maxOccurs="2"/>
           </xsd:sequence>
       </xsd:complexType>
   </xsd:element>

</xsd:schema>

</source>
   
  


Reference element with fixed value

   <source lang="xml">

File: Data.xml <?xml version="1.0"?> <ElementExamples xmlns="http://www.wbex.ru"

                  xmlns:ex="http://www.wbex.ru"
                  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                  xsi:schemaLocation=
                             "http://www.wbex.ru
                              Schema.xsd">
   <aircraft/>                      
   <aircraft>Boeing 747</aircraft>  

</ElementExamples>

File: Schema.xsd <?xml version="1.0"?> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"

           targetNamespace="http://www.wbex.ru"
           xmlns="http://www.wbex.ru"
           elementFormDefault="qualified">
   <xsd:element name="aircraft" fixed="Boeing 747">
       <xsd:simpleType>
           <xsd:restriction base="xsd:string">
               <xsd:enumeration value="Boeing 747"/>
           </xsd:restriction>
       </xsd:simpleType>
   </xsd:element>
   <xsd:element name="ElementExamples">
       <xsd:complexType>
           <xsd:sequence>
               <xsd:element ref="aircraft" maxOccurs="2"/>
           </xsd:sequence>
       </xsd:complexType>
   </xsd:element>

</xsd:schema>

</source>
   
  


Set fixed value for attribute during simpleType declaration

   <source lang="xml">

File: Data.xml <?xml version="1.0"?> <AttributeExamples xmlns="http://www.wbex.ru"

                  xmlns:i="http://www.wbex.ru"
                  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                  xsi:schemaLocation="http://www.wbex.ru Schema.xsd">
   <image/>                                
   <image i:src="http://www.wbex.ru"/>  

</AttributeExamples> File: Schema.xml <?xml version="1.0"?> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"

           targetNamespace="http://www.wbex.ru"
           xmlns="http://www.wbex.ru"
           elementFormDefault="qualified">
   <xsd:element name="image">
       <xsd:complexType>
           <xsd:attribute ref="src"/>
       </xsd:complexType>
   </xsd:element>
   <xsd:attribute name="src" fixed="http://www.wbex.ru">
       <xsd:simpleType>
           <xsd:restriction base="xsd:anyURI">
               <xsd:enumeration value="http://www.wbex.ru"/>
               <xsd:enumeration value="http://www.wbex.ru/style/logo.png"/>
               <xsd:enumeration value="http://www.wbex.ru/isbn.html"/>
           </xsd:restriction>
       </xsd:simpleType>
   </xsd:attribute>
   <xsd:element name="AttributeExamples">
       <xsd:complexType>
           <xsd:sequence>
               <xsd:element ref="image" maxOccurs="2"/>
           </xsd:sequence>
       </xsd:complexType>
   </xsd:element>

</xsd:schema>

</source>