Spatial Expressions and Rules for Location-based Services in Oracle Aravind Yalamanchi, Ravi Kothuri, and Siva Ravada   View Paper (PDF)   Return to September 2005, Database Issues for Location Data Management, Volume 28, Number 3 Abstract In this paper, we present Oracle technologies for handling spatial events and specifying arbitrary spatial rules. The framework allows construction of arbitrary expressions involving spatial predicates, indexing them using an expression filter index, and incorporating them as conditions within an event-conditionaction (ECA) rule. This framework provides a seamless integration of multiple components within Oracle and provides a rich set of functionality for location-based service applications. ©2006 Association for Computing Machinery