XML CreateElement

Hi,

I have an existing script that outputs an XML file, I need to alter the header and add some elements, I need some pointers please, examples below:

This is the header code:
$dom = new DOMDocument('1.0', 'utf-8');
 $element = $dom->createElement('DTD_ORDER');

This outputs:
<?xml version="1.0" encoding="utf-8"?>
<DTD_ORDER>*******************</DTD_ORDER>

What I need to do is add in some elements so result looks like:

<SyncSalesOrder xmlns:v2="http://xmlns.oracle.com/EnterpriseObjects/Core/Common/V2" xmlns:v1="http://xmlns.oracle.com/EnterpriseObjects/Core/EBO/PickList/V1" releaseID="9.0" xmlns:wsa="http://www.w3.org/2005/08/addressing" xmlns="http://www.openapplications.org/oagis/9"><ApplicationArea><Sender><LogicalID>5029125000000</LogicalID><ComponentID></ComponentID><TaskID>SalesOrder</TaskID><ReferenceID>1</ReferenceID></Sender><CreationDateTime>2014-11-04T18:53:51+10:30</CreationDateTime></ApplicationArea><DataArea><Sync><ActionCriteria><ActionExpression actionCode="Sync"/></ActionCriteria></Sync><DTD_ORDER>*************</DTD_ORDER></DataArea></SyncSalesOrder>


Where
The ReferenceId should be the transmission number(date/hour as 0711201408)
The CreationDateTime should be the transmission date and time

Getting bogged down in this, any help appreciated

Thanks