XUL is an [http://en.wikipedia.org/wiki/Xml XML] language and thus has the advantages of inserting being cross-platform also allows for the insertion of other XML languages into it such as [http://en.wikipedia.org/wiki/Xhtml XHTML], [http://en.wikipedia.org/wiki/MathML MathML] and [http://en.wikipedia.org/wiki/Svg SVG]. Also because of its localized structure it can be easily translated into other languages.