>There should also be a *:DETAILHEADER [childalias] command for use in the comment snippet of report objects indicating it is a header for the details from the [childalias] table and that it should only be printed if details exist in [childalias] for this parent record.

And also need a *:DETAILFOOTER [childalias] command and a *:DETAILSUM [reportvariable] command for summing extended detail columns.