昨日のつづき。subgraphで凡例をつける。 図 GraphvizでDFD(凡例つき) DFD_example.dot digraph sample { graph [fontname = "monospace", fontsize = 10, rankdir = LR]; node [fontname = "monospace", fontsize = 10]; edge [fontname = "monospace", fontsize = 10]; // legend subgraph cluster_legend { label = "凡例"; source [shape = box, label = "入力/出力"]; function [shape = circle, label = "プロセス"]; data_base [shape = folder, label = "デ