Are separate Header nodes required for each analytical method submitted?
A separate Header node is always required for each Document Type Definition (DTD) referenced. Generic DTDs have been created and posted that can be applied to multiple methods. As a result, multiple methods can now be reported under a single Header node as long as the same DTD is being referenced. However, some clients [e.g., Contract Laboratory Program (CLP) SOM01.0], due to their internal data processing/management systems, still require that separate files be submitted for each method reported.
