  Support for human-to-human interactions over a network is still insufficient,
particularly for professional virtual communities (PVC). Among other
limitations, adaptation and learning-by-experience capabilities of humans are
not taken into account in existing models for collaboration processes in PVC.
This paper presents a model for adaptive human collaboration. A key element of
this model is the use of negotiation for adaptation of social protocols
modelling processes. A second contribution is the proposition of various
adaptation propagation strategies as means for continuous management of the PVC
inheritance.
