GUI specification files may be written using XMLmind XML Editor[4] or using a text editor.
If you use a text editor, do not forget to validate your GUI specification against its schema. After downloading and installing the add-on called "A configuration for specifying XMLmind XML Editor GUIs" using
. Unix example:XXE_user_preferences_dir
/addon/xxe_gui_config/xsd/gui.xsd
~/.xxe/addon$ /opt/xxe/bin/xsdvalid -s ~/.xxe/addon/xxe_gui_config/xsd/gui.xsd tutorial7.xxe_gui
[4] You'll need to download and install the add-on called "A configuration for specifying XMLmind XML Editor GUIs" in order to do that.