creating child resources - DataDock/datadock GitHub Wiki
By default DataDock will create a single resource for each row in the CSV file, this one resource then has properties on it that are defined by the columns in the CSV file.
When you specify that a column type is either "URI" or "URI Template", this column creates a child resource. A child resource is a new resource with its own URI identifier and that can have properties of its own.
Once one or more columns are set to type "URI" or "URI Template", you can use the Advanced tab to assign the parent for each column. Setting the parent to "[Row]" adds the property for that column to the default row resource. Setting the parent to one of the other URI/URI Template columns will add the property to that resource instead of the row resource.
NOTE: The Parent drop-down list shows all of the columns in the CSV file, but only those which are currently marked as a "URI" or "URI Template" type column are selectable. If you select a column as a Parent and then later change the type of the Parent column to something other than "URI" or "URI Template", all properties using that column as a parent will be reassigned back to the default row resource.