http://graphviz.org/doc/info/attrs.htmlhttp://graphs.grevian.org/http://graphs.grevian.org/examplehttp://www.linuxdevcenter.com/pub/a/linux/2004/05/06/graphviz_dot.html
dot-- 资源汇总
原文:http://www.cnblogs.com/itzxy/p/7860276.html