<?xml version="1.0" encoding="utf-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified">
  <xs:include schemaLocation="common.xsd"/>
  <xs:include schemaLocation="common.header.xsd"/>
  <xs:element name="part">
    <xs:complexType>
      <xs:sequence>
        <xs:element ref="header"/>
        <xs:element minOccurs="0" ref="description"/>
        <xs:element maxOccurs="unbounded" ref="include"/>
      </xs:sequence>
    </xs:complexType>
  </xs:element>
  <xs:element name="description">
    <xs:complexType>
      <xs:choice minOccurs="0" maxOccurs="unbounded">
        <xs:element ref="block"/>
        <xs:element ref="quote"/>
        <xs:element ref="br"/>
        <xs:element ref="marker"/>
        <xs:element ref="warning"/>
        <xs:element ref="note"/>
      </xs:choice>
    </xs:complexType>
  </xs:element>
  <xs:element name="include">
    <xs:complexType>
      <xs:attribute name="file" use="required"/>
    </xs:complexType>
  </xs:element>
</xs:schema>