Entities can be organized into hierarchies, and relationships are governed by cardinality constraints. A streamlined data model is showed in Figure 4. In the model each batch is identified by an ID (batchID), which is unique within the SC. Each actor is uniquely identified by an identifier actor (actorID). The batchID contains the actorID. Typically batchID is attached as a bar code on the batch of seed, batch of seedling and batch of package.