The ClimTrans2050 research plan provides a framework for modelling long-run transition processes. A deepened structural modelling approach is proposed for the development of a fully operational open source model for Austria. The mindset for the proposed modelling framework rests on a number of innovative aspects: functionalities (shelter, mobility, nutrition, etc.) as ultimate goal of economic activity; stock-flow interactions providing functionalities; distinction of three tiers for modelling (physical, economic and institutional layers). The research plan also lists knowledge gaps and next research steps and addresses how Austrian emissions could be embedded into a global context.