Change Lower bound of defaultValue in the concept parameter from 1 to 0,
remove eOpposite from databinding in DomainConcept
change lower bound of dynamicBehavior in IFMLAction from 1 to 0
Change lower bound of domainConcept in Databinding for 1 to 0
set the Eopposte of parentViewComponentPart in ViewComponentPart
valid exampl after fixing the metamodel  - issue #12