Unable to define a choice field

Question

I've to create with Visual Studio 2012 a Document Library for SharePoint 2013. I've started defining the unique field in an empty element:

<?xml version="1.0" encoding="utf-8"?>
<Elements xmlns="http://schemas.microsoft.com/sharepoint/">
  <Field  ID="{cf3eb7b7-3621-4b3d-b6a8-a01c4a0dbaf1}"
          Name="DUMMY"
          StaticName="DUMMY"
          DisplayName="DUMMY"
          Type="Choice"
          Format="RadioButtons"
          FillInChoice="FALSE"
          SourceID="http://schemas.microsoft.com/sharepoint/v3/fields"
          Required="TRUE"
          Group="DUMMY">
    <CHOICES>
      <CHOICE>DUMMY</CHOICE>
      <CHOICE>DUMMY</CHOICE>
    </CHOICES>
  </Field>
</Elements>

After the content type:

<?xml version="1.0" encoding="utf-8"?>
<Elements xmlns="http://schemas.microsoft.com/sharepoint/">
  <!-- Parent ContentType: Item (0x01) -->
  <ContentType ID="0x010097577133AD4B429E8EEF2927AD9EEB04" 
               Name="DUMMY" 
               Group="DUMMY" 
               Description="DUMMY" 
               Inherits="FALSE" 
               Version="0" 
               ReadOnly="FALSE">
    <FieldRefs>
      <FieldRef ID="{CF3EB7B7-3621-4B3D-B6A8-A01C4A0DBAF1}" 
                DisplayName="DUMMY" 
                Required="TRUE" 
                Name="DUMMY" />
    </FieldRefs>
  </ContentType>
</Elements>

The Document Library definition:

<?xml version="1.0" encoding="utf-8" ?>
<Elements xmlns="http://schemas.microsoft.com/sharepoint/">
    <ListTemplate
        Name="DUMMY"
        Type="10000"
        BaseType="1"
        OnQuickLaunch="TRUE"
        SecurityBits="11"
        Sequence="110"
        DisplayName="DUMMY"
        Description=""
        Image="/_layouts/15/images/itdl.png"
        DocumentTemplate="121"/>
</Elements>

And the Document Library instance:

<?xml version="1.0" encoding="utf-8"?>
<Elements xmlns="http://schemas.microsoft.com/sharepoint/">
  <ListInstance
    Title="DUMMY"
    OnQuickLaunch="TRUE"
    TemplateType="10000"
    Url="Lists/DUMMY"
    Description="" />
 </Elements>

The Document Library has been correctly created but when I upload a file my custom field has an empty dropdown. I've also done what I need by browser and downloaded the xml from SharePoint, searched for the custom field definition and pasted in my project but it didn't work anyway...

Thank you

Answer 1

I found the solution for my issue. I've to update the document library definition Schema.xml too.

Something like this

  <Field ID="{F9BD72AE-1DB2-4D10-AF6D-A2F12B8D0408}"
         Name="DUMMY"
         DisplayName="DUMMY"
         Type="Choice"
         Format="RadioButtons"
         Required="TRUE"
         Group="DUMMY">
    <Default>N</Default>
    <CHOICES>
      <CHOICE Value="DUMMY">DUMMY</CHOICE>
      <CHOICE Value="DUMMY">DUMMY</CHOICE>
    </CHOICES>
  </Field>
</Fields>