I am using Freeplane as a viewer of xsd document. It works perfectly for all the nodes, except, I am not able to insert simple text content into a richcontent element of a node element in a free plane map.
During the loading of the .mm file, freeplane generates a parsing error (Error while parsing file :...) . I got the following line in the log file :
java.lang.RuntimeException: java.lang.RuntimeException: extension of class org.freeplane.features.note.NoteModel already registered
here is an example of .mm file I generated for freeplane.