is a project of the Information Processing Technology Office
of the Defense Advanced Research Projects Agency
. According to its bid solicitation pamphlet, is to be "an ontology
-based (sub)system that captures, stores, and makes accessible the flow of one person's experience in and interactions with the world in order to support a broad spectrum of associates/assistants and other system capabilities. The objective of this 'LifeLog' concept is to be able to trace the 'threads' of an individual's life in terms of events, states, and relationships."
LifeLog aims to compile a massive electronic database of every activity and relationship a person engages in. This is to include credit card purchases, web sites visited, the content of telephone calls and e-mails sent and received, scans of faxes and postal mail sent and received, instant messages sent and received, books and magazines read, television and radio selections, physical location recorded via wearable GPS sensors, biomedical data captured through wearable sensors, The high level goal of this data logging is to identify "preferences, plans, goals, and other markers of intentionality." 
- PIP 03-30, DARPA's bid solicitation for LifeLog