https://www.infopathdev.com:443/blogs/matt/archive/2006/02/02/Setup-Namespaces-for-a-Secondary-Data-Source.aspxAn often overlooked fact about accessing a secondary data source via code behind an InfoPath form is the need to setup the correct namespaces. Tutorials presented throughout the Internet often presume that the process for setting up namespaces is alreadyenCommunityServer 2007 SP3 (Build: 31118.962)https://www.infopathdev.com:443/blogs/matt/archive/2006/02/02/Setup-Namespaces-for-a-Secondary-Data-Source.aspx#43417Wed, 24 Jun 2009 19:02:52 GMT033a2e2d-04e2-4a9d-be01-a4634161eefd:43417warrtalon<p>Matt, great job. &nbsp;I didn't have do anything with code, but I was able to quickly use your guide to determine the proper namespace for a SharePoint secondary data connection (tasks list) for use in the CopyTable qRule. &nbsp;Saving my template as source files and viewing the Tasks.xsd showed right away that the answer was &quot;dfs.&quot;</p> <p>Kudos.</p> <img src="https://www.infopathdev.com:443/aggbug.aspx?PostID=43417" width="1" height="1">https://www.infopathdev.com:443/blogs/matt/archive/2006/02/02/Setup-Namespaces-for-a-Secondary-Data-Source.aspx#21446Wed, 04 Jul 2007 09:45:46 GMT033a2e2d-04e2-4a9d-be01-a4634161eefd:21446skaaal<p>You may be interested in extracting programmatically the namespace URI : just follow the link above.</p> <img src="https://www.infopathdev.com:443/aggbug.aspx?PostID=21446" width="1" height="1">