Based on process model definition described by relational structure, direction control logical realizes Sequence, XOR-Split and XOR-Join, And-Split and And-Join transition types.

• 根据基于关系结构的流程模型定义,流向控制逻辑实现了顺序控制、选择分支与选择合并、并行分支与并行合并等流向控制。