xml - Change the restrictions of a simpletype element in child type -

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i have type hierarchy in xsd following: type -> type b -> type c...

now type b defined like:

   <xs:complextype name="typeb">     <xs:complexcontent>       <xs:extension base="typea" >         <xs:sequence>           ...           <xs:element name="elementa" minoccurs="0">             <xs:simpletype>               <xs:restriction base="xs:int">                 <xs:mininclusive value="0"/>                 <xs:maxinclusive value="10"/>               </xs:restriction>             </xs:simpletype>           </xs:element>         </xs:sequence>       </xs:extension>     </xs:complexcontent>   </xs:complextype>

type c not need add elements type b defined like:

  <xs:complextype name="typec">     <xs:complexcontent>       <xs:extension base="typeb">       </xs:extension>     </xs:complexcontent>   </xs:complextype>

now restrictions type c elementa have changed - it's maxincluse should 5 not 10.

i can change type c changing type b should not break compatibility. there way change restrictions without breaking compatibility/the existing hierarchy?

you can declaring typec restriction of typeb , explicitly redefining complex content. however, work, need explicitly declare simple type restricts xs:int between 0 , 10, , explicitly restrict simple type changes maxinclusive 5. important simple type restriction explicit, explained here.

the schema so:

<?xml version="1.0" encoding="utf-8"?> <xs:schema xmlns:xs="http://www.w3.org/2001/xmlschema">   <xs:element name="elementc" type="typec"/>   <xs:complextype name="typea">     <xs:sequence>       <xs:element name="foobar" type="xs:string"/>     </xs:sequence>   </xs:complextype>   <xs:complextype name="typeb">     <xs:complexcontent>       <xs:extension base="typea" >         <xs:sequence>           <xs:element name="elementa" type="type10" minoccurs="0"/>         </xs:sequence>       </xs:extension>     </xs:complexcontent>   </xs:complextype>     <xs:simpletype name="type10">     <xs:restriction base="xs:int">       <xs:mininclusive value="0"/>       <xs:maxinclusive value="10"/>     </xs:restriction>   </xs:simpletype>   <xs:simpletype name="type5">     <xs:restriction base="type10">       <xs:maxinclusive value="5"/>     </xs:restriction>   </xs:simpletype>   <xs:complextype name="typec">     <xs:complexcontent>       <xs:restriction base="typeb">         <xs:sequence>           <xs:element name="foobar" type="xs:string"/>           <xs:element name="elementa" type="type5" minoccurs="0"/>         </xs:sequence>       </xs:restriction>     </xs:complexcontent>   </xs:complextype> </xs:schema>

and valid:

<?xml version="1.0" encoding="utf-8"?> <elementc xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"  xsi:nonamespaceschemalocation="schema.xsd">   <foobar/>   <elementa>5</elementa> </elementc>

and not:

<?xml version="1.0" encoding="utf-8"?> <elementc xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"  xsi:nonamespaceschemalocation="schema.xsd">   <foobar/>   <elementa>6</elementa> </elementc>

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