<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" targetNamespace="http://www.w3.org/1999/xlink" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:mathml="http://www.w3.org/1998/Math/MathML">
  <xs:import namespace="http://www.w3.org/1998/Math/MathML" schemaLocation="mathml2.xsd"/>
  <xs:attribute name="href"/>
</xs:schema>