Ordering of sibling nodes depends on the order of the lines. Lines can be moved to change this ordering.
Text box input: If you refresh this screen, the text area will be cleared, so you should select the text, copy it,
paste it into an editor and save as a text file to save your work.
File input : the file must be selected each time.
This application uses PHP for scripting and AT&T's
Graphviz package for graph layout.