When
you select a text frame, table, table cells, or an image, and then
click the Autotag icon in the Tags panel, InDesign applies a default tag
to the item you selected. You can specify these default tags in
the Tagging Preset Options dialog box.
Note: InDesign applies
a default tag when you create an element that requires a parent
element, but doesn’t yet have one. For example, if you tag text within
a text frame but the frame itself isn’t tagged, InDesign assigns
the frame a tag according to the Tagging Preset Options. The capability
to apply default tags helps InDesign maintain
correct XML structure.