@proceedings {3400, title = {Specification and Implementation of IFC-Based Performance Metrics to Support Building Life Cycle Assessment of Hybrid Energy Systems}, journal = {SimBuild 2004, Building Sustainability and Performance Through Simulation}, year = {2004}, month = {08/2004}, address = {Boulder, Colorado, USA}, author = {Elmer Morrissey and James O{\textquoteright}Donnell and Marcus Keane and Vladimir Bazjanac} }