There are also graphical XML editors that hide the code in the background and present the content to the user in a more user-friendly format, approximating the rendered version or editing forms.
Some of the larger XML packages even offer XSLT debugging features and XSL-FO processors for generation of PDF files from documents.
When they are not WYSIWYG, they do not display the (or one of the) graphical end result of a document, but instead focus on conveying the meaning of the text.
For instance, in a text editor, it is possible to create a row with too many cells in the table, while this would not be possible with the above graphical user interface.
WYSIWYG editors let people edit files directly with the tags represented by some form of graphical viewing rather than bare XML code.
Naive use of a WYSIWYG editor can lead to the creation of documents that do not have the intrinsic semantics of the particular XML language.
This comes about if the user is focused on trying to achieve a certain visual presentation with the editor, rather than using the WYSIWYG to make editing the document easier.