<?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>