XMLmind XML Editor is a validating, near WYSIWYG, DocBook editor, DITA editor, MathML editor, XHTML 5 editor, XML editor. Because XMLmind XML Editor is highly extensible, it may be also be used to create documents conforming to your own custom schema. Its users are generally technical writers who need to author large, complex, modular, documents. It can be used to author modular documents, even very fine grained ones. It has both an automatic spell checker (underlines misspelled words as they are typed) and a ``traditional'' spell checker. The Compare tool shows the differences existing between two revisions of an initial document. This tool also allows to accept or reject some or all the changes.