Chapter 1: Digital Memories and the Personal Content Explosion This book sets the stage for understanding personal content experience. This is a vast topic, tightly coupled with increasing mobility, our per- sonal memories, and daily communications with others. We introduce and explore issues such as context capture, user interfaces for continuous mobile use, UI design for mobile media applications, metadata magic, virtual communities, and ontologies. User interactions and behavioural patterns with personal content are also covered, resulting in a “GEMS” lifecycle model for analysing media devices, services, applications, and user interfaces. We examine per- sonal content from a number of viewpoints, and present a mobile prototype software framework, complete with extensible ontologies, which realizes the requirements of an enjoyable personal content experience. Personal Content Experience: Managing Digital Life in the Mobile Age J. Lehikoinen, A. Aaltonen, P. Huuskonen and I. Salminen © 2007 John Wiley & Sons, Ltd