IJCAI Conference 2005 Conference Paper
BLOG: Probabilistic Models with Unknown Objects
- Brian Milch
- Bhaskara Marthi
- Stuart Russell
- David Sontag
- Daniel L. Ong
- Andrey
This paper introduces and illustrates BLOG, a formal language for defining probability models over worlds with unknown objects and identity uncertainty. BLOG unifies and extends several existing approaches. Subject to certain acyclicity constraints, every BLOG model specifies a unique probability distribution over first-order model structures that can contain varying and unbounded numbers of objects. Furthermore, complete inference algorithms exist for a large fragment of the language. We also introduce a probabilistic form of Skolemization for handling evidence.