<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           elementFormDefault="qualified">

  <!-- Define the root element, 'playlist' -->
  <xs:element name="playlist">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="stylesheet" minOccurs="0" maxOccurs="1">
          <xs:complexType mixed="true">
            <xs:sequence>
              <xs:any namespace="##any" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
            </xs:sequence>
            <xs:attribute name="id" type="xs:ID" use="required"/>
            <xs:attribute name="version" type="xs:string" use="required"/>
            <xs:anyAttribute namespace="##any" processContents="lax"/>
          </xs:complexType>
        </xs:element>
        <xs:element name="song" minOccurs="1" maxOccurs="unbounded">
          <xs:complexType>
            <xs:sequence>
              <xs:element name="title" type="xs:string"/>
              <xs:element name="artist" type="xs:string"/>
            </xs:sequence>
          </xs:complexType>
        </xs:element>
      </xs:sequence>
    </xs:complexType>
  </xs:element>

</xs:schema>