The preconstructed error tree has only the png option, which is not usable for integrating the result into software tools (Sonarqube). A working solution for this problem would be a json string as result, containing the raw data (vertices, edges and labels). A possible structure for the raw data would be nested Json objects representing the vertices. Another way would be in graph format G=(V, E) with the objects as vertices and the edges as tuples of two vertices.