Start with a simple text list of variables within groups

• Simple example
• Note the type of each group
• Note the label for each group

Transform into XML (with a script or program)

• Output for the simple example
• Note the label for each group
• Note the type of each group
• Automatic sequential numbering of each group

Comments

• The text list is easy to prepare and modify
• The XML output is inserted into the DDI file