Expressing user profiles for data recharging

Mobile devices need two basic renewable resources - power and data. Power recharging is easy; data recharging is a much more problematic activity. It requires complex interaction between a user and a collection of data sources. We provide an automatic data recharging capability based on user profiles written in an expressive profile language. A profile identifies relevant information and orders it by its usefulness. We discuss the issues involved in designing a profile language for data recharging.