Portions of an Extensible Markup Language document, such as individual paragraphs or groups of paragraphs or fragments of text, are provided self-describing properties such as styles, fonts, list types, and the like. If such a portion of a document is subsequently copied or moved to a second document...http://www.google.fr/patents/US7617447?utm_source=gb-gplus-shareBrevet US7617447 - Context free document portions
