8 Personal Content Experience: Managing Digital Life in the Mobile Age can be applied in analysis and design of mobile devices, applications, and services related to personal content. Chapter 4: Metadata Magic In Chapter 4, we discuss metadata (data about data), one of the most important technology enablers related to personal content experience. We inspect metadata from several points of view, including existing metadata formats and frameworks, user benefi ts, the relationship between metadata, mobility, and context-awareness, and metadata management implementation issues. We also address closely related topics, such as increasing the semantics of content. Chapter 5: Realizing a Metadata Framework The beginning of Chapter 5 introduces the challenges related to dis- tributed mobile content, and points out that metadata management is the key to solving these challenges. We discuss why metadata manage- ment cannot be left to applications alone but why a system-wide metadata framework is needed. We also discuss different types of metadata available in mobile devices. We then move deeper into metadata ontologies to ensure interoperability between applications and show how to create future-proof metadata taxonomies (and why!). We also present the design and implementation of a prototype content management framework, targeted especially at mobile use. Finally, we show how the framework functions in a mobile device. Chapter 6: User Interfaces for Mobile Media Chapter 6 focuses on mobile personal experience from the end-user’s perspective. We start by providing a brief overview to users and then discuss how the user can interact with mobile personal content from various points of view. We discuss mobile user interface design to shed light on how user interfaces can be created based on the user’s tasks. Finally, we illustrate what are the related tasks, and what is required from the UI perspective. Chapter 7: Application Outlook Chapter 7 combines what has been presented in the preceding chap- ters, and discusses application and service design for experiencing per- sonal content. We present some general features of mobile applications and discuss several application types, and introduce existing implemen- tations, while analysing their strengths and weaknesses. We focus on some contemporary and upcoming content-rich applications in the domains of location-based services, content sharing, games, fi tness,