Add root with static values to xml file create by SQL query

The following creates an xml file in the format shown at the bottom. I got a requirement from our 3rd application developer that there needs to be an upper root (? or namespace ?) above the current root. I have zero idea on how to accomplish this.

-- DDL and sample data population, start
DECLARE @tbl TABLE (
    	ProductID nvarchar(25) NULL,
    	[Name] nvarchar(25) NULL,
    	ParentID nvarchar(51) NULL,
    	AttributeType nvarchar(10) NULL,
    	AttributeID nvarchar(255) NULL,
    	AttributeValue nvarchar(4000) NULL
);

INSERT INTO @tbl (ProductID, [Name], ParentID, AttributeType, AttributeID, AttributeValue)
VALUES 
('1557505','DVSCTV-HT','39122206_5183','Value','IDW_EnvironmentalConditions','Indoor use only'),
('1557505','DVSCTV-HT','39122206_5183','Value','IDW_Enclosure','Plastic'),
('1557505','DVSCTV-HT','39122206_5183','MultiValue','IDW_Color','Hot'),
('1557505','DVSCTV-HT','39122206_5183','MultiValue','IDW_Color','Purple'), 
('1557505','DVSCTV-HT','39122206_5183','MultiValue','IDW_Color','Yellow');
-- DDL and sample data population, end

SELECT ProductID AS [@ID]
	, 'CatalogNumber' AS [@UserTypeID]
	, ParentID AS [@ParentID]
	, Name AS [Name]
	, (SELECT AttributeType, AttributeID, AttributeValue
		FROM @tbl AS c
		WHERE p.ProductID = c.ProductID
			AND p.ParentID = c.ParentID
			AND p.[Name] = c.[Name]
		FOR XML PATH('r'), TYPE, ROOT('root')
).query('<Values>
{
	for $x in /root/r[AttributeType="Value"]
	return <Value AttributeID="{data($x/AttributeID)}">{data($x/AttributeValue)}</Value>,
	<MultiValue AttributeID="{(/root/r[AttributeType="MultiValue"]/AttributeID/text())[1]}">
    {
        for $x in /root/r[AttributeType="MultiValue"]/AttributeValue/text()
        return <Value>{$x}</Value>
    }
    </MultiValue>
}
</Values>')
FROM @tbl AS p
GROUP BY ProductID, ParentID, [Name]
FOR XML PATH('Product'), TYPE, ROOT('Products');

Here is the formatted output:

<Products>
  <Product ID="1557505" UserTypeID="CatalogNumber" ParentID="39122206_5183">
    <Name>DVSCTV-HT</Name>
    <Values>
      <Value AttributeID="IDWIndexID">10706063</Value>
      <Value AttributeID="IDW_ChangeFlag">A</Value>
      <Value AttributeID="IDW_StockIndicatorLOV">S</Value>
      <Value AttributeID="IDW_GTIN">00027557663526</Value>
      <MultiValue AttributeID="IDW_Color">
        <Value>Hot</Value>
        <Value>Plastic</Value>
      </MultiValue>
    </Values>
  </Product>
</Products>

But i need a root above this with static values so the output should look like this:

<STEP-ProductInformation ImportContext="Context1" ContextID="Context1" WorkspaceID="Main" UseContextLocale="false"> 
	<Products>
		<Product ID="1557505" UserTypeID="CatalogNumber" ParentID="39122206_5183">
			<Name>DVSCTV-HT</Name>
			<Values>
				<Value AttributeID="IDWIndexID">10706063</Value>
				<Value AttributeID="IDW_ChangeFlag">A</Value>
				<Value AttributeID="IDW_StockIndicatorLOV">S</Value>
				<Value AttributeID="IDW_GTIN">00027557663526</Value>
				<MultiValue AttributeID="IDW_Color">
					<Value>Hot</Value>
					<Value>Plastic</Value>
				</MultiValue>
			</Values>
		</Product>
	</Products>
</STEP-ProductInformation>

Thanks for any help you can provide.

Please try the following solution.

SQL

-- DDL and sample data population, start
DECLARE @tbl TABLE (
ProductID nvarchar(25) NULL,
[Name] nvarchar(25) NULL,
ParentID nvarchar(51) NULL,
AttributeType nvarchar(10) NULL,
AttributeID nvarchar(255) NULL,
AttributeValue nvarchar(4000) NULL
);
INSERT INTO @tbl (ProductID, [Name], ParentID, AttributeType, AttributeID, AttributeValue)
VALUES 
('1557505','DVSCTV-HT','39122206_5183','Value','IDW_EnvironmentalConditions','Indoor use only'),
('1557505','DVSCTV-HT','39122206_5183','Value','IDW_Enclosure','Plastic'),
('1557505','DVSCTV-HT','39122206_5183','MultiValue','IDW_Color','Hot'),
('1557505','DVSCTV-HT','39122206_5183','MultiValue','IDW_Color','Purple'), 
('1557505','DVSCTV-HT','39122206_5183','MultiValue','IDW_Color','Yellow');
-- DDL and sample data population, end
SELECT 'Context1' AS [@ImportContext]
, 'Context1' AS [@ContextID]
, 'Main' AS [@WorkspaceID]
, 'false' AS [@UseContextLocale]
, (
SELECT ProductID AS [@ID]
, 'CatalogNumber' AS [@UserTypeID]
, ParentID AS [@ParentID]
, Name AS [Name]
, (SELECT AttributeType, AttributeID, AttributeValue
FROM @tbl AS c
WHERE p.ProductID = c.ProductID
AND p.ParentID = c.ParentID
AND p.[Name] = c.[Name]
FOR XML PATH('r'), TYPE, ROOT('root')
).query('<Values>
{
for $x in /root/r[AttributeType="Value"]
return <Value AttributeID="{data($x/AttributeID)}">{data($x/AttributeValue)}</Value>,
<MultiValue AttributeID="{(/root/r[AttributeType="MultiValue"]/AttributeID/text())[1]}">
{
for $x in /root/r[AttributeType="MultiValue"]/AttributeValue/text()
return <Value>{$x}</Value>
}
</MultiValue>
}
</Values>')
FROM @tbl AS p
GROUP BY ProductID, ParentID, [Name]
FOR XML PATH('Product'), TYPE, ROOT('Products')
)
FOR XML PATH('STEP-ProductInformation'), TYPE;

Output

<STEP-ProductInformation ImportContext="Context1" ContextID="Context1" WorkspaceID="Main" UseContextLocale="false">
<Products>
<Product ID="1557505" UserTypeID="CatalogNumber" ParentID="39122206_5183">
<Name>DVSCTV-HT</Name>
<Values>
<Value AttributeID="IDW_EnvironmentalConditions">Indoor use only</Value>
<Value AttributeID="IDW_Enclosure">Plastic</Value>
<MultiValue AttributeID="IDW_Color">
<Value>Hot</Value>
<Value>Purple</Value>
<Value>Yellow</Value>
</MultiValue>
</Values>
</Product>
</Products>
</STEP-ProductInformation>