xsd problem

I am new in learning XML. I have to create a XSD for my XML file.
Below is my XSD file. But I got an error like this:
s4s-elt-must-match.1: The content of 'Album' must match (annotation?, (simpleType | complexType)?, (unique | key | keyref)*)). A problem was found starting at: element. music.xsd

I cannot figured it out. Could anyone help me? Thanks a lot!

my xml file

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<?xml version="1.0" encoding="UTF-8" standalone="yes"?> 

<Music xmlns:xs="http://www.w3.org/2001/XMLSchema">

  <!-- First ALbum -->

  <Album>

    <Title>Take Care</Title>

    <AlbumArtist>Drake</AlbumArtist>

    <Genre>Pop</Genre>

    <Year>2012</Year>

    <Publisher>Cash Money Records Inc</Publisher>

    <Price concurrency="AUD">12.0</Price>

    <Song>

      <Title>Over My Dead Body</Title>

      <Artist>Drake</Artist>

      <Genre>Pop</Genre>

      <Album>Take Care</Album>

      <Year>2012</Year>

      <Price concurrency="AUD">2.0</Price> 

    </Song>    

    <Song>

      <Title>Shot For Me</Title>

      <Artist>Drake</Artist>

      <Genre>Pop</Genre>

      <Album>Take Care</Album>

      <Year>2012</Year>

      <Price concurrency="AUD">1.0</Price>     

    </Song>

    <Song>

      <Title>Headlines</Title>

      <Artist>Drake</Artist>

      <Genre>HipHop</Genre>

      <Album>Take Care</Album>

      <Year>2012</Year>

      <Price concurrency="AUD">2.5</Price>     

    </Song>

    <Song>

      <Title>We'll Be Fine</Title>

      <Artist>Drake</Artist>

      <Genre>Pop</Genre>

      <Album>Take Care</Album>

      <Year>2012</Year>

      <Price concurrency="AUD">3.0</Price>     

    </Song>

    <Song>

      <Title>Lord Knows</Title>

      <Artist>Drake</Artist>

      <Genre>Pop</Genre>

      <Album>Take Care</Album>

      <Year>2012</Year>

      <Price concurrency="AUD">2.0</Price>     

    </Song>

    <Song>

      <Title>Do It Wrong</Title>

      <Artist>Drake</Artist>

      <Genre>Hip-Hop</Genre>

      <Album>Take Care</Album>

      <Year>2012</Year>

      <Price concurrency="AUD">2.5</Price>     

    </Song>

  </Album> 

    <!-- Second ALbum -->

  <Album>

    <Title>Lioness: Hidden Treasures</Title>

    <AlbumArtist>AmyWinehouse</AlbumArtist>

    <Genre>Soul</Genre>

    <Year>2011</Year>

    <Publisher>Universal Island Records</Publisher>

    <Price concurrency="AUD">14.0</Price>

    <Song>

      <Title>Tears Cry</Title>

      <Artist>AmyWinehouse</Artist>

      <Genre>Soul</Genre>

      <Album>Lioness: Hidden Treasures</Album>

      <Year>2011</Year>

      <Price concurrency="AUD">3.0</Price> 

    </Song>    

    <Song>

      <Title>Like Smoke</Title>

      <Artist>AmyWinehouse</Artist>

      <Genre>Soul</Genre>

      <Album>Lioness: Hidden Treasures</Album>

      <Year>2011</Year>

      <Price concurrency="AUD">2.0</Price>    

    </Song>

    <Song>

      <Title>Will You Still Love Me Tomorrow?</Title>

      <Artist>Amy Winehouse</Artist>

      <Genre>Soul</Genre>

      <Album>Lioness: Hidden Treasures</Album>

      <Year>2011</Year>

      <Price concurrency="AUD">2.5</Price>   

    </Song>

    <Song>

      <Title>Wake Up Alone</Title>

      <Artist>Amy Winehouse</Artist>

      <Genre>Soul</Genre>

      <Album>Lioness: Hidden Treasures</Album>

      <Year>2011</Year>

      <Price concurrency="AUD">2.0</Price>     

    </Song>

    <Song>

      <Title>Body And Soul</Title>

      <Artist>Amy Winehouse</Artist>

      <Genre>Soul</Genre>

      <Album>Lioness: Hidden Treasures</Album>

      <Year>2011</Year>

      <Price concurrency="AUD">12.0</Price>    

    </Song>

    <Song>

      <Title>A Song For You</Title>

      <Artist>Amy Winehouse</Artist>

      <Genre>Soul</Genre>

      <Album>Lioness: Hidden Treasures</Album>

      <Year>2011</Year>

      <Price concurrency="AUD">1.5</Price>    

    </Song>

    <Song>

      <Title>Half TIme</Title>

      <Artist>Amy Winehouse</Artist>

      <Genre>Soul</Genre>

      <Album>Lioness: Hidden Treasures</Album>

      <Year>2011</Year>

      <Price concurrency="AUD">1.5</Price>    

    </Song>

  </Album>

  <!-- Third ALbum -->

  <Album>

    <Title>Classic Mountain Songs from Smithsonian Folkways</Title>

    <AlbumArtist/>

    <Genre>Country</Genre>

    <Year>2008</Year>

    <Publisher/>

    <Price concurrency="AUD">8.0</Price>

    <Song>

      <Title>Super Baby</Title>

      <Artist>Dock Boggs</Artist>

      <Genre>Country</Genre>

      <Album>Classic Mountain Songs from Smithsonian Folkways</Album>

      <Year>2008</Year>

      <Price concurrency="AUD">1.0</Price> 

    </Song>    

     <Song>

      <Title>John Hery</Title>

      <Artist>Lesley Riddle</Artist>

      <Genre>Country</Genre>

      <Album>Classic Mountain Songs from Smithsonian Folkways</Album>

      <Year>2008</Year>

      <Price concurrency="AUD">1.5</Price> 

    </Song>

     <Song>

      <Title>Coal Creek March</Title>

      <Artist>Pete Steele</Artist>

      <Genre>Country</Genre>

      <Album>Classic Mountain Songs from Smithsonian Folkways</Album>

      <Year>2008</Year>

      <Price concurrency="AUD">0.5</Price> 

    </Song>

    <Song>

      <Title>Railroad Blues</Title>

      <Artist>Sam McGee</Artist>

      <Genre>Country</Genre>

      <Album>Classic Mountain Songs from Smithsonian Folkways</Album>

      <Year>2008</Year>

      <Price concurrency="AUD">0.5</Price>     

    </Song>

     <Song>

      <Title>Sixteen Tons</Title>

      <Artist>George Davis</Artist>

      <Genre>Country</Genre>

      <Album>Classic Mountain Songs from Smithsonian Folkways</Album>

      <Year>2008</Year>

      <Price concurrency="AUD">1.5</Price> 

    </Song> 

    <Song>

      <Title>I Am A Poor Pilgrim Of Sorrow</Title>

      <Artist>Old Regular Baptists</Artist>

      <Genre>Country</Genre>

      <Album>Classic Mountain Songs from Smithsonian Folkways</Album>

      <Year>2008</Year>

      <Price concurrency="AUD">0.5</Price> 

    </Song> 

  </Album>

  <!-- Fourth ALbum -->

  <Album>

    <Title>Talk That Talk</Title>

    <AlbumArtist>Rihanna</AlbumArtist>

    <Genre>Pop</Genre>

    <Year>2011</Year>

    <Publisher>Def Jam Records</Publisher>

    <Price concurrency="AUD">10.0</Price>

    <Song>

      <Title>We Found Love</Title>

      <Artist>Rihanna</Artist>

      <Genre>HipHop</Genre>

      <Album>Talk That Talk</Album>

      <Year>2011</Year>

      <Price concurrency="AUD">2.0</Price> 

    </Song>    

    <Song>

      <Title>Farewell</Title>

      <Artist>Rihanna</Artist>

      <Genre>HipHop</Genre>

      <Album>Talk That Talk</Album>

      <Year>2011</Year>

      <Price concurrency="AUD">1.0</Price> 

    </Song> 

    <Song>

      <Title>Birthday Cake</Title>

      <Artist>Rihanna</Artist>

      <Genre>HipHop</Genre>

      <Album>Talk That Talk</Album>

      <Year>2011</Year>

      <Price concurrency="AUD">1.5</Price> 

    </Song> 

    <Song>

      <Title>We All Want Love</Title>

      <Artist>Rihanna</Artist>

      <Genre>Pop</Genre>

      <Album>Talk That Talk</Album>

      <Year>2011</Year>

      <Price concurrency="AUD">1.0</Price> 

    </Song> 

    <Song>

      <Title>Red Lipstick</Title>

      <Artist>Rihanna</Artist>

      <Genre>HipHop</Genre>

      <Album>Talk That Talk</Album>

      <Year>2011</Year>

      <Price concurrency="AUD">2.0</Price> 

    </Song> 

    <Song>

      <Title>Fool In Love</Title>

      <Artist>Rihanna</Artist>

      <Genre>Pop</Genre>

      <Album>Talk That Talk</Album>

      <Year>2011</Year>

      <Price concurrency="AUD">1.5</Price> 

    </Song> 

    <Song>

      <Title>Where Have You Been</Title>

      <Artist>Rihanna</Artist>

      <Genre>Pop</Genre>

      <Album>Talk That Talk</Album>

      <Year>2011</Year>

      <Price concurrency="AUD">3.0</Price> 

    </Song> 

    <Song>

      <Title>Drunk On Love</Title>

      <Artist>Rihanna</Artist>

      <Genre>HipHop</Genre>

      <Album>Talk That Talk</Album>

      <Year>2011</Year>

      <Price concurrency="AUD">2.0</Price> 

    </Song> 

  </Album>

  <!-- Fifth ALbum -->

  <Album>

    <Title>World Connections</Title>

    <AlbumArtist>Linkin Park</AlbumArtist>

    <Genre>Electronic</Genre>

    <Year>2011</Year>

    <Publisher>Record Union</Publisher>

    <Price concurrency="AUD">4.0</Price>

    <Song>

      <Title>Put Your Hands Up</Title>

      <Artist>Linkin Park</Artist>

      <Genre>ELectronic</Genre>

      <Album>World Connections</Album>

      <Year>2011</Year>

      <Price concurrency="AUD">2.0</Price> 

    </Song>    

    <Song>

      <Title>New Divide</Title>

      <Artist>Linkin Park</Artist>

      <Genre>ELectronic</Genre>

      <Album>World Connections</Album>

      <Year>2011</Year>

      <Price concurrency="AUD">1.0</Price> 

    </Song>

    <Song>

      <Title>Got To Know</Title>

      <Artist>Linkin Park</Artist>

      <Genre>ELectronic</Genre>

      <Album>World Connections</Album>

      <Year>2011</Year>

      <Price concurrency="AUD">1.0</Price> 

    </Song>

    <Song>

      <Title>Getting Over You</Title>

      <Artist>Linkin Park</Artist>

      <Genre>ELectronic</Genre>

      <Album>World Connections</Album>

      <Year>2011</Year>

      <Price concurrency="AUD">1.0</Price> 

    </Song>

  </Album>

  <!-- Sixth ALbum -->

  <Album>

    <Title>Jason Mraz Live + Acoustic 2001</Title>

    <AlbumArtist>James Blunt</AlbumArtist>

    <Genre>Pop</Genre>

    <Year>2008</Year>

    <Publisher>Jason Mraz/TuneCore</Publisher>

    <Price concurrency="AUD">7.0</Price>

    <Song>

      <Title>Running</Title>

      <Artist>Jason Mraz</Artist>

      <Genre>Pop</Genre>

      <Album>Jason Mraz Live + Acoustic 2001</Album>

      <Year>2008</Year>

      <Price concurrency="AUD">1.0</Price> 

    </Song>    

    <Song>

      <Title>You And I Both</Title>

      <Artist>Jason Mraz</Artist>

      <Genre>Pop</Genre>

      <Album>Jason Mraz Live + Acoustic 2001</Album>

      <Year>2008</Year>

      <Price concurrency="AUD">1.5</Price> 

    </Song> 

    <Song>

      <Title>Bright Eyes</Title>

      <Artist>Jason Mraz</Artist>

      <Genre>Pop</Genre>

      <Album>Jason Mraz Live + Acoustic 2001</Album>

      <Year>2008</Year>

      <Price concurrency="AUD">2.0</Price> 

    </Song> 

    <Song>

      <Title>Halfway Home</Title>

      <Artist>Jason Mraz</Artist>

      <Genre>Pop</Genre>

      <Album>Jason Mraz Live + Acoustic 2001</Album>

      <Year>2008</Year>

      <Price concurrency="AUD">0.5</Price> 

    </Song> 

    <Song>

      <Title>Unfold</Title>

      <Artist>Jason Mraz</Artist>

      <Genre>Pop</Genre>

      <Album>Jason Mraz Live + Acoustic 2001</Album>

      <Year>2008</Year>

      <Price concurrency="AUD">1.0</Price> 

    </Song> 

    <Song>

      <Title>1000 Things</Title>

      <Artist>Jason Mraz</Artist>

      <Genre>Pop</Genre>

      <Album>Jason Mraz Live + Acoustic 2001</Album>

      <Year>2008</Year>

      <Price concurrency="AUD">1.5</Price> 

    </Song> 

    <Song>

      <Title>After An Afternoon</Title>

      <Artist>Jason Mraz</Artist>

      <Genre>Pop</Genre>

      <Album>Jason Mraz Live + Acoustic 2001</Album>

      <Year>2008</Year>

      <Price concurrency="AUD">1.0</Price> 

    </Song> 

    <Song>

      <Title>Conversation With Myself</Title>

      <Artist>Jason Mraz</Artist>

      <Genre>Pop</Genre>

      <Album>Jason Mraz Live + Acoustic 2001</Album>

      <Year>2008</Year>

      <Price concurrency="AUD">0.5</Price> 

    </Song> 

    <Song>

      <Title>Zero Percent</Title>

      <Artist>Jason Mraz</Artist>

      <Genre>Pop</Genre>

      <Album>Jason Mraz Live + Acoustic 2001</Album>

      <Year>2008</Year>

      <Price concurrency="AUD">1.0</Price> 

    </Song> 

    <Song>

      <Title>Common Pleasure</Title>

      <Artist>Jason Mraz</Artist>

      <Genre>Pop</Genre>

      <Album>Jason Mraz Live + Acoustic 2001</Album>

      <Year>2008</Year>

      <Price concurrency="AUD">2.0</Price> 

    </Song> 

    <Song>

      <Title>Hey Love</Title>

      <Artist>Jason Mraz</Artist>

      <Genre>Pop</Genre>

      <Album>Jason Mraz Live + Acoustic 2001</Album>

      <Year>2008</Year>

      <Price concurrency="AUD">1.0</Price> 

    </Song> 

  </Album>

  <!-- Seventh ALbum -->

  <Album>

    <Title>Boys and Girls Soundtrack</Title>

    <AlbumArtist>Ronan Keating</AlbumArtist>

    <Genre>Pop</Genre>

    <Year>2000</Year>

    <Publisher>Ark 21 Records / IODA</Publisher>

    <Price concurrency="AUD">6.0</Price>

    <Song>

      <Title>Happiness</Title>

      <Artist>Ronan Keating</Artist>

      <Genre>Pop</Genre>

      <Album>Boys and Girls Soundtrack</Album>

      <Year>2000</Year>

      <Price concurrency="AUD">0.5</Price> 

    </Song>    

    <Song>

      <Title>I Know A Girl</Title>

      <Artist>Ronan Keating</Artist>

      <Genre>Pop</Genre>

      <Album>Boys and Girls Soundtrack</Album>

      <Year>2000</Year>

      <Price concurrency="AUD">0.5</Price> 

    </Song> 

    <Song>

      <Title>When You Arrive</Title>

      <Artist>Ronan Keating</Artist>

      <Genre>Pop</Genre>

      <Album>Boys and Girls Soundtrack</Album>

      <Year>2000</Year>

      <Price concurrency="AUD">0.5</Price> 

    </Song> 

    <Song>

      <Title>Think Of Me</Title>

      <Artist>Ronan Keating</Artist>

      <Genre>Pop</Genre>

      <Album>Boys and Girls Soundtrack</Album>

      <Year>2000</Year>

      <Price concurrency="AUD">0.5</Price> 

    </Song>  

    <Song>

      <Title>Gorgeous</Title>

      <Artist>Ronan Keating</Artist>

      <Genre>Pop</Genre>

      <Album>Boys and Girls Soundtrack</Album>

      <Year>2000</Year>

      <Price concurrency="AUD">0.5</Price> 

    </Song> 

    <Song>

      <Title>Quitter</Title>

      <Artist>Ronan Keating</Artist>

      <Genre>Pop</Genre>

      <Album>Boys and Girls Soundtrack</Album>

      <Year>2000</Year>

      <Price concurrency="AUD">0.5</Price> 

    </Song>  

    <Song>

      <Title>Now Or Never</Title>

      <Artist>Ronan Keating</Artist>

      <Genre>Pop</Genre>

      <Album>Boys and Girls Soundtrack</Album>

      <Year>2000</Year>

      <Price concurrency="AUD">0.5</Price> 

    </Song> 

    <Song>

      <Title>World Of A King</Title>

      <Artist>Ronan Keating</Artist>

      <Genre>Pop</Genre>

      <Album>Boys and Girls Soundtrack</Album>

      <Year>2000</Year>

      <Price concurrency="AUD">0.5</Price> 

    </Song> 

    <Song>

      <Title>Get You Off My Mind</Title>

      <Artist>Ronan Keating</Artist>

      <Genre>Pop</Genre>

      <Album>Boys and Girls Soundtrack</Album>

      <Year>2000</Year>

      <Price concurrency="AUD">0.5</Price> 

    </Song> 

  </Album>

</Music>

xsd file

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<?xml version="1.0" encoding="UTF-8"?>

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
 
 <xs:element name="Music">

   <xs:complexType>

     <xs:sequence>

       <xs:element name="Album" type="xs:string" minOccurs="1" maxOccurs="unbounded">  

         <xs:element name="Title" type="xs:string" />

         <xs:element name="AlbumArtist" type="xs:string" minOccurs="0" maxOccurs="1" />

         <xs:element name="Genre" type="xs:string" />

         <xs:element name="Year" type="xs:integer" />

         <xs:element name="Publisher" type="xs:string" />

         <xs:complexType>              

           <xs:sequence>

             <xs:element name="Price" type="xs:float">

               <xs:attribute name="currency" fixed="AUD" use="required" />

             </xs:element> 

           </xs:sequence>

         </xs:complexType> 

         <xs:complexType>

           <xs:sequence>

             <xs:element name="Song" type="xs:string" maxOccurs="unbounded">

               <xs:element name="Title" type="xs:string" />

                 <xs:element name="Artist" type="xs:string" />

                 <xs:element name="Genre" type="xs:string" />

                 <xs:element name="Album" type="xs:string" />

                 <xs:element name="Year" type="xs:integer" />

                 <xs:complexType>

                   <xs:sequence>

                     <xs:element name="Price" type="xs:float">

                       <xs:attribute name="currency" fixed="AUD" use="required" />

                     </xs:element>

                   </xs:sequence>

                 </xs:complexType>

               </xs:element>

             </xs:sequence>

           </xs:complexType>

        </xs:element>

      </xs:sequence>

    </xs:complexType>

  </xs:element>   

</xs:schema>

Mar 18 '12 #1

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2166

Dormilich

8,658

Expert Mod 8TB

are you sure the xsd element for Album should be not empty?

Mar 18 '12 #2

emilyQ

Hi, Dormilich.
Thanks for your reply.
I do not quite understand what you mean. I think Album should be not empty, otherwise it makes no sense. It at least contains list of subelements like Genre, Year, Price etc. Could you please tell me more about your opinion? Do I have any syntax error in my xsd file?

Mar 18 '12 #3

Dormilich

8,658

Expert Mod 8TB

the problem is that <Album> is used twice. as child element of <Music> (where it is a complexType element) and <Song> (where it is a simpleType element).

Mar 18 '12 #4

emilyQ

So how can I fix these kind of problem? Actually, I still have <Genre>, <Year>, <Price> respectively used twice in <Album> and <Song>. Can i just use another name?

Mar 18 '12 #5

emilyQ

Gotcha. I just got confused Tag with Element. I can define different meaningful tag name.
Thanks, Dormilich.

Mar 18 '12 #6

xsd problem

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