AXIOM is an approach for modeling and analysis of complex systems based on expert-sourced data. It proposes a systems modeling language and a computational process to extract information of higher analytical value from a model built using the language. AXIOM can be placed in the family of cross-impact analysis techniques, and it proposes solutions for several practical problems associated with systems modeling using the established cross-impact techniques. This paper presents the AXIOM modeling language primitives, outlines the computational process and shows how the evaluated AXIOM model can be used for analysis of the modeled system.