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    <p>If I have understood correctly, you are referring to the behavior that you might see in a query like this: </p> <pre><code>DECLARE @Order TABLE ( OrderID INT, OrderDate DATETIME) DECLARE @OrderDetail TABLE ( OrderID INT, ItemID VARCHAR(1), ItemName VARCHAR(50), Qty INT) INSERT @Order VALUES (1, '2010-01-01'), (2, '2010-01-02') INSERT @OrderDetail VALUES (1, 'A', 'Drink', 5), (1, 'B', 'Cup', 2), (2, 'A', 'Drink', 2), (2, 'C', 'Straw', 1), (2, 'D', 'Napkin', 1) ;WITH XMLNAMESPACES('http://test.com/order' AS od) SELECT OrderID AS "@OrderID", (SELECT ItemID AS "@od:ItemID", ItemName AS "data()" FROM @OrderDetail WHERE OrderID = o.OrderID FOR XML PATH ('od.Item'), TYPE) FROM @Order o FOR XML PATH ('od.Order'), TYPE, ROOT('xml') </code></pre> <p>Which gives the following results: </p> <pre><code>&lt;xml xmlns:od="http://test.com/order"&gt; &lt;od.Order OrderID="1"&gt; &lt;od.Item xmlns:od="http://test.com/order" od:ItemID="A"&gt;Drink&lt;/od.Item&gt; &lt;od.Item xmlns:od="http://test.com/order" od:ItemID="B"&gt;Cup&lt;/od.Item&gt; &lt;/od.Order&gt; &lt;od.Order OrderID="2"&gt; &lt;od.Item xmlns:od="http://test.com/order" od:ItemID="A"&gt;Drink&lt;/od.Item&gt; &lt;od.Item xmlns:od="http://test.com/order" od:ItemID="C"&gt;Straw&lt;/od.Item&gt; &lt;od.Item xmlns:od="http://test.com/order" od:ItemID="D"&gt;Napkin&lt;/od.Item&gt; &lt;/od.Order&gt; &lt;/xml&gt; </code></pre> <p>As you said, the namespace is repeated in the results of the subqueries.</p> <p>This behavior is a feature according to a conversation on devnetnewsgroup (website now defunct) although there is the option to <a href="https://connect.microsoft.com/SQLServer/feedback/details/265956" rel="nofollow noreferrer">vote</a> on changing it.</p> <p>My proposed solution is to revert back to <code>FOR XML EXPLICIT</code>:</p> <pre><code>SELECT 1 AS Tag, NULL AS Parent, 'http://test.com/order' AS [xml!1!xmlns:od], NULL AS [od:Order!2], NULL AS [od:Order!2!OrderID], NULL AS [od:Item!3], NULL AS [od:Item!3!ItemID] UNION ALL SELECT 2 AS Tag, 1 AS Parent, 'http://test.com/order' AS [xml!1!xmlns:od], NULL AS [od:Order!2], OrderID AS [od:Order!2!OrderID], NULL AS [od:Item!3], NULL [od:Item!3!ItemID] FROM @Order UNION ALL SELECT 3 AS Tag, 2 AS Parent, 'http://test.com/order' AS [xml!1!xmlns:od], NULL AS [od:Order!2], o.OrderID AS [od:Order!2!OrderID], d.ItemName AS [od:Item!3], d.ItemID AS [od:Item!3!ItemID] FROM @Order o INNER JOIN @OrderDetail d ON o.OrderID = d.OrderID ORDER BY [od:Order!2!OrderID], [od:Item!3!ItemID] FOR XML EXPLICIT </code></pre> <p>And see these results: </p> <pre><code>&lt;xml xmlns:od="http://test.com/order"&gt; &lt;od:Order OrderID="1"&gt; &lt;od:Item ItemID="A"&gt;Drink&lt;/od:Item&gt; &lt;od:Item ItemID="B"&gt;Cup&lt;/od:Item&gt; &lt;/od:Order&gt; &lt;od:Order OrderID="2"&gt; &lt;od:Item ItemID="A"&gt;Drink&lt;/od:Item&gt; &lt;od:Item ItemID="C"&gt;Straw&lt;/od:Item&gt; &lt;od:Item ItemID="D"&gt;Napkin&lt;/od:Item&gt; &lt;/od:Order&gt; &lt;/xml&gt; </code></pre>
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    1. POHow do I remove redundant namespace in nested query when using FOR XML PATH
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    1. CO+1 Cheers for your answer, any thoughts on how this compares to the alternative? (see my answer to my question)
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