xml - Enforcing validation of a secondary attribute based on another attribute in XSD -


question

is there way enforce subtype "percent" if basetype "percent"?

i mean, have validation fail if basetype "percent" subtype isn't "percent"?

xml partial

<quantity name="abc"  basetype="percent" value="2" subtype="percent"/>

xsd pertinent sections

          <xs:element name="thing">             <xs:complextype>               <xs:attribute name="name" type="xs:string" use="required"/>               <xs:attribute name="basetype" type="basetype" use="required"/>               <xs:attribute name="value" type="xs:double" use="required"/>               <xs:attribute name="subtype" type="subtype" use="required"/>             </xs:complextype>           </xs:element>    <xs:simpletype name="basetype">     <xs:restriction base="xs:string">         <xs:enumeration value="fixed"/>         <xs:enumeration value="percent"/>     </xs:restriction>   </xs:simpletype>     <xs:simpletype name="subtype">     <xs:restriction base="xs:string">         <xs:enumeration value="foo"/>         <xs:enumeration value="percent"/>         <xs:enumeration value="bar"/>     </xs:restriction>   </xs:simpletype>

xsd 1.0

xsd 1.0 cannot represent constraint.

xsd 1.1

xsd 1.1 can represent constraint using xs:assert:

<?xml version="1.0" encoding="utf-8"?> <xs:schema xmlns:xs="http://www.w3.org/2001/xmlschema"   xmlns:vc="http://www.w3.org/2007/xmlschema-versioning"   vc:minversion="1.1">    <xs:element name="quantity">     <xs:complextype>       <xs:attribute name="name" type="xs:string" use="required"/>       <xs:attribute name="basetype" type="basetype" use="required"/>       <xs:attribute name="value" type="xs:double" use="required"/>       <xs:attribute name="subtype" type="subtype" use="required"/>       <xs:assert test="(@basetype != 'percent') or (@subtype = 'percent')"/>     </xs:complextype>   </xs:element>    <xs:simpletype name="basetype">     <xs:restriction base="xs:string">       <xs:enumeration value="fixed"/>       <xs:enumeration value="percent"/>     </xs:restriction>   </xs:simpletype>    <xs:simpletype name="subtype">     <xs:restriction base="xs:string">       <xs:enumeration value="foo"/>       <xs:enumeration value="percent"/>       <xs:enumeration value="bar"/>     </xs:restriction>   </xs:simpletype>  </xs:schema>

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