<?xml version="1.0" encoding="UTF-8"?>
<xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="x_uri" xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:element name="x" type="x:xType" xmlns:x="x_uri"/>
  <xs:complexType name="xType">
    <xs:sequence>
      <xs:element ref="nam:a" xmlns:nam="namespace_uri"/>
    </xs:sequence>
  </xs:complexType>
</xs:schema>