In order to clarify the instructions, 'structure' and 'tree' has the same meaning when referred in this context.
|details||choosing such option will result in printing both compared structures in a pre-order traversal.|
|mapping||specifies the matching substructures between the first and the second structures. It returns a column of nodes in the first structure and their matching nodes in the second structure.|
|flip||defines the number of flip operations allowed when comparing the two structures. It returns the indexes of the flipping nodes (if such founded) as well as the corresponding indexes of nucleotides at the primary level.|