The specification of business processes is becoming a more and more critical aspect for organizations.
 Such processes are specified as workflow models expressing the logical precedence among the different business
 activities (i.e., the units of work). Up to now, workflow models have been commonly managed through specific 
subsystems, called workflow management systems. In this paper we advocate for an integration of the workflow 
specification in the domain conceptual schema. This workflow-extended schema is automatically derived from the 
workflow model and comprises some new entity and relationship types for describing the workflow elements and a 
set of integrity constraints to ensure the workflow precedence rules.