In Industry 4.0 scenarios, the presence of formalized and enforced governance rules helps to clarify how core and external contributors should collaborate to co-design and deliver key subsystems of the finished product. This clarity diminishes the time for establishing collaborations and facilitates tasks execution. However, current governance rules are usually more implicit than explicit and often are subject to time-consuming negotiation before a new collaboration starts. The concept of Industry 4.0 demands higher levels of dynamism; therefore, we present the importance of governance rules in such digital marketplaces. In this short paper, we lay out the foundation for enabling the explicit definition and enforcement of governance rules by proposing a specialized Abstract Syntax Metamodel for specifying governance rules. With such a model, we aim to aid demand-driven production and logistics service collaborations between suppliers towards enabling a quicker and more predictable creation and execution of the tasks involved.