<?xml version=“1.0” encoding=“UTF-8”?> <xs:schema xmlns:xs=“www.w3.org/2001/XMLSchema

        xmlns:m="http://www.w3.org/1998/Math/MathML"
        elementFormDefault="qualified"
        targetNamespace="http://www.w3.org/1998/Math/MathML">
<xs:element name="math">
   <xs:complexType>
      <xs:group minOccurs="0" maxOccurs="unbounded" ref="m:MathExpression"/>
      <xs:attributeGroup ref="m:math.attributes"/>
   </xs:complexType>
</xs:element>
<xs:attributeGroup name="CommonDeprecatedAtt">
   <xs:attribute name="other"/>
</xs:attributeGroup>
<xs:attributeGroup name="CommonAtt">
   <xs:attribute name="id" type="xs:ID"/>
   <xs:attribute name="xref"/>
   <xs:attribute name="class" type="xs:NMTOKENS"/>
   <xs:attribute name="style" type="xs:string"/>
   <xs:attribute name="href" type="xs:anyURI"/>
   <xs:attributeGroup ref="m:CommonDeprecatedAtt"/>
   <xs:anyAttribute namespace="##other" processContents="skip"/>
</xs:attributeGroup>
<xs:attributeGroup name="math.deprecatedattributes">
   <xs:attribute name="mode" type="xs:string"/>
   <xs:attribute name="macros" type="xs:string"/>
</xs:attributeGroup>
<xs:attributeGroup name="name">
   <xs:attribute name="name" use="required" type="xs:NCName"/>
</xs:attributeGroup>
<xs:attributeGroup name="cd">
   <xs:attribute name="cd" use="required" type="xs:NCName"/>
</xs:attributeGroup>
<xs:attributeGroup name="src">
   <xs:attribute name="src" type="xs:anyURI"/>
</xs:attributeGroup>
<xs:element name="annotation">
   <xs:complexType mixed="true">
      <xs:attributeGroup ref="m:annotation.attributes"/>
   </xs:complexType>
</xs:element>
<xs:complexType name="annotation-xml.model">
   <xs:choice minOccurs="0" maxOccurs="unbounded">
      <xs:group ref="m:MathExpression"/>
      <xs:group ref="m:anyElement"/>
   </xs:choice>
</xs:complexType>
<xs:group name="anyElement">
   <xs:choice>
      <xs:any namespace="##other" processContents="skip"/>
      <xs:any namespace="##local" processContents="skip"/>
   </xs:choice>
</xs:group>
<xs:element name="annotation-xml">
   <xs:complexType>
      <xs:complexContent>
         <xs:extension base="m:annotation-xml.model">
            <xs:attributeGroup ref="m:annotation.attributes"/>
         </xs:extension>
      </xs:complexContent>
   </xs:complexType>
</xs:element>
<xs:attributeGroup name="annotation.attributes">
   <xs:attributeGroup ref="m:CommonAtt"/>
   <xs:attribute name="cd" type="xs:NCName"/>
   <xs:attribute name="name" type="xs:NCName"/>
   <xs:attributeGroup ref="m:DefEncAtt"/>
   <xs:attributeGroup ref="m:src"/>
</xs:attributeGroup>
<xs:attributeGroup name="DefEncAtt">
   <xs:attribute name="encoding" type="xs:string"/>
   <xs:attribute name="definitionURL" type="xs:anyURI"/>
</xs:attributeGroup>
<xs:group name="semantics">
   <xs:sequence>
      <xs:element name="semantics">
         <xs:complexType>
            <xs:sequence>
               <xs:group ref="m:MathExpression"/>
               <xs:choice minOccurs="0" maxOccurs="unbounded">
                  <xs:element ref="m:annotation"/>
                  <xs:element ref="m:annotation-xml"/>
               </xs:choice>
            </xs:sequence>
            <xs:attributeGroup ref="m:semantics.attributes"/>
         </xs:complexType>
      </xs:element>
   </xs:sequence>
</xs:group>
<xs:attributeGroup name="semantics.attributes">
   <xs:attributeGroup ref="m:CommonAtt"/>
   <xs:attributeGroup ref="m:DefEncAtt"/>
   <xs:attribute name="cd" type="xs:NCName"/>
   <xs:attribute name="name" type="xs:NCName"/>
</xs:attributeGroup>
<xs:simpleType name="length">
   <xs:restriction base="xs:string">
      <xs:pattern value="\s*((-?[0-9]*(\.[0-9]*)?(e[mx]|in|cm|mm|p[xtc]|%)?)|(negative)?((very){0,2}thi(n|ck)|medium)mathspace)\s*"/>
   </xs:restriction>
</xs:simpleType>

</xs:schema>