The eXtensible Markup Language(XML)desc ribes a document's structure and content,not the style of the elements on the paGe.The style can be added to a document with a style sheet-Both Cascading Style Sheet(CSS)and eXtensible Style Languange(XSL)can produce such a style sheet.The HyperTex t Markup Language(HTML)provides a markup that looks like,by which XML document can be easily bound to some HTML elements.