A level-1 diagram is a DFD that represents a system's major processes,data flows,and data stores at a high level of detail.

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A level-1 diagram is a DFD (Data Flow Diagram) that provides more detail than a context diagram (level-0), breaking down the system into sub-processes, but it does not represent the highest level of detail; further decomposition can occur in level-2, level-3 diagrams, etc.

A Level-1 Diagram Is a DFD That Represents a System's