ID’s

ID’s, which identify commands and are used when pressing the F1 key in the GIMP interface, are in https://git.gnome.org/browse/gimp/tree/app/widgets/gimphelp-ids.h

XML Tags Examples

procedure : in using/web.xml.

table : in toolbox/tools-painting.xml.

programlisting : in filters/web/slice.xml.

segmentedlist : in dialogs/path-dialog.xml for a n columns list.

Here is a diagram I often use.