270 Personal Content Experience: Managing Digital Life in the Mobile Age JPEG are formats for images, the actual editing is different, as SVG is vector graphics and JPEG is a bitmap. We acknowledge that editing different content objects require special and dedicated applications and technologies, but we do not review them further as they would probably be a topic of another book. The edit task relates to many other GEMS tasks. For example, when composing a presentation, the user often wants to create a new object as a part of it. Most likely, the user also needs to browse and search for relevant content. Furthermore, to validate the end result, the user may wish to preview the set. As the preceding example illustrates, editing is a task that produces a lot of relevant metadata. For instance, as the user combines several objects to create a presentation, a message, or a slideshow, this implies then that the objects have a relationship, which the user has explicitly created. 6.5.4 Maintain Content Interacting with personal content involves increasingly using different devices that form a personal device ecosystem (Chapter 4). The fact that the content is distributed implies that it is of utmost importance that the user can move, archive, synchronize, and back-up content between the different devices (the technical problems related to such tasks are discussed in Chapter 5). Currently, the desktop computer acts as a hub, where all mobile devices can then connect (from time to time). Compared to mobile devices, the desktop computer offers better computing, storage, and interaction capabilities. In addition, home PCs have often a fast, fl at- rate broadband xDSL connection. These facts, together with other capabilities, offer a wide range of content experience features to all GEMS phases. For example, Lifeblog is a combination of PC and mobile software that is designed to store, organize, browse, search, and edit personal content fi les, such as images, videos, and messages that the users have collected with their mobile phones (Lifeblog). Because maintaining tasks require exchanging information between devices and the amount of content may be massive (consider a full back-up of all personal content), the user appreciates a connection that is fast, cheap, and reliable. Besides, security needs to be considered as the data may be sensitive and private. The typical wireless connec- tions for maintaining are WLAN and Bluetooth, which are convenient from the user perspective as a physical connection is not required. Other widely used methods are a USB cable, and a memory card for an ad hoc sneakernet.