Description You may wish to begin by reading the text widget conceptual overview which gives an overview of all the objects and data types related to the text widget and how they work together. GtkTextTagTables as GtkBuildable The GtkTextTagTable implementation of the GtkBuildable interface supports adding tags by specifying "tag" as the "type" attribute of a <child> element. You may wish to begin by reading the text widget conceptual overview which gives an overview of all the objects and data types related to the text widget and how they work together.