Overview.- Motivation for a theoretical foundation for collaborative networks.- Related work on reference modeling for collaborative networks.- Towards a CN reference model.- Overview.- Reference modeling: Needs and basic terminology.- Collaboration forms.- The ARCON modeling framework.- ARCON reference models for collaborative networks.- A comprehensive semantic indexing schema for ARCON.- Further steps on CN reference modeling.- Modeling Tools And Approaches.- Overview.- A survey of modeling methods and tools.- A survey of soft modeling approaches for collaborative networks.- Modeling examples.- Overview.- A multi-model approach to analyze inter-organizational trust in VBEs.- Networked partner selection with robust portfolio modeling.- Modeling collaboration preparedness assessment.- A benefit analysis model for collaborative networks.- An approach in value systems modeling.- Selection of a virtual organization coordinator.- Modeling the value of expectations in collaborative networked organizations.- Prospective performance measurement in virtual organizations.- Erratum.