Currently, our file format is not portable between different implementations of Gliffy. The is particularly noticeable with uploaded images in the Gliffy Plugin For Confluence and Gliffy Online. The XML node that represents the images is different between the two implementations. This is due to that fact that GPFC links to images on pages, using the page ID as a reference, while Gliffy Online refers to imageID's used for storage on that host. By including the images in the file format, the document format will become portable.