<xsd:schema 
  xmlns:xsd="http://www.w3.org/2001/XMLSchema"
  xmlns:prophoto="http://prophoto.com/xml"
  targetNamespace="http://prophoto.com/xml"
  >
  
  <xsd:element name="photo" type="prophoto:Photo" />
  
  <xsd:complexType name="Photo">
    <xsd:sequence>
      <xsd:element name="caption" type="xsd:string" />
      <xsd:element name="photographer" type="prophoto:Photographer" />
      <xsd:element name="camera" type="prophoto:Camera" />
      <xsd:element name="lens" type="prophoto:Lens" />
      <xsd:element name="datecaptured" type="xsd:date" />
      <xsd:element name="description" type="xsd:string" />
    </xsd:sequence>
  </xsd:complexType>
  
  <xsd:complexType name="Photographer">
    <xsd:sequence>
      <xsd:element name="firstname" type="xsd:string" />
      <xsd:element name="lastname" type="xsd:string" />
      <xsd:element name="birthdate" type="xsd:date" />
    </xsd:sequence>
  </xsd:complexType>
    
  <xsd:complexType name="Camera">
    <xsd:sequence>
      <xsd:element name="manufacturer" type="xsd:string" />
      <xsd:element name="modelnumber" type="xsd:string" />
    </xsd:sequence>
  </xsd:complexType>
  
  <xsd:complexType name="Lens">
    <xsd:sequence>
      <xsd:element name="manufacturer" type="xsd:string" />
      <xsd:element name="modelnumber" type="xsd:string" />
      <xsd:element name="minfocallength" type="xsd:integer" />
      <xsd:element name="maxfocallength" type="xsd:integer" />
    </xsd:sequence>
  </xsd:complexType>
  
</xsd:schema>