2012/3/12 Albert Astals Cid <aacid at kde.org>: > Do you have a link to one of the specs that speaks about it? It's an Adobe extension http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/devnet/acrobat/pdfs/adobe_supplement_iso32000.pdf or http://bit.ly/Aywmcb Page 10, 76ff. Best Martin