Hi,
Disadvantages of WYM Editor :
* Much of the white space information is lost during parsing and the XSL transformation.
* The current Media Wiki parser does not provide enough information about templates and other generated content in an article's HTML.
Any HTML to wiki markup conversion tool will need more information about the generated content than the Media Wiki parser currently includes in the HTML which it generates. Otherwise it will have to interpret templates as normal content. The most direct solution to this problem is to make the parser include more information.