title: Sharepoint 2010 list schema deployment
body: <p>I have create a list schema definition and list instance in VS2010. I have a feature that deploys both list definition and instance, plus a feature stappler which actives the new feature for each new sub site.</p>
  
  <p>My list definition schema.xml is:</p>
  
  <pre><code> &lt;Fields&gt;
    &lt;Field Name="StartDate" Type="DateTime" Required="FALSE" DisplayName="Start Date" StaticName="StartDate" ID="9ea1256f-6b67-43b0-8ab7-1d643bf8a834" SourceID="http://schemas.microsoft.com/sharepoint/v3" ColName="datetime1" RowOrdinal="0" /&gt;
    &lt;Field Name="EndDate" Type="DateTime" Required="FALSE" DisplayName="End Date" StaticName="EndDate" ID="900503fa-4ab1-4938-be75-b40694ab97b6" SourceID="http://schemas.microsoft.com/sharepoint/v3" ColName="datetime2" RowOrdinal="0" /&gt;
  </code></pre>
  
  <p>I deploy successfully and create a new site using my site definitions, list gets created successfully all things work.</p>
  
  <p>Now i want to add another field to my list, i go back to visual studio 2010 edit list definition schema.xml and add another field in Metadata fields section.</p>
  
  <p>The schema.xml is now:</p>
  
  <pre><code>    &lt;Fields&gt;
    &lt;Field Name="StartDate" Type="DateTime" Required="FALSE" DisplayName="Start Date" StaticName="StartDate" ID="9ea1256f-6b67-43b0-8ab7-1d643bf8a834" SourceID="http://schemas.microsoft.com/sharepoint/v3" ColName="datetime1" RowOrdinal="0" /&gt;
    &lt;Field Name="EndDate" Type="DateTime" Required="FALSE" DisplayName="End Date" StaticName="EndDate" ID="900503fa-4ab1-4938-be75-b40694ab97b6" SourceID="http://schemas.microsoft.com/sharepoint/v3" ColName="datetime2" RowOrdinal="0" /&gt;
  
    &lt;!-- New Field --&gt;
  
    &lt;Field Name="TestRedeploy" Type="Text" Required="FALSE" DisplayName="TestRedeploy" StaticName="TestRedeploy"  RichText="True" Sortable="FALSE" ID="A5656659-CD3E-4C84-AEAC-554DCE25434B" SourceID="http://schemas.microsoft.com/sharepoint/v3" ColName="ntext3" RowOrdinal="0" /&gt;
  &lt;/Fields&gt;
  </code></pre>
  
  <p>I build and deploy successfully, but when i go in list settings to check if new column was added i find that all columns have been deleted. Can you help me figure out how to deploy new columns with schema.xml ?</p>