Great intro! I love graphviz, it's saved me tons of time. My former colleague wrote a "code parser" that went through SAS and SQL code, creating dependency tree

Great intro! I love graphviz, it's saved me tons of time. My former colleague wrote a "code parser" that went through SAS and SQL code, creating dependency trees of the data/tables and procedures/functions used. She wrote it in SAS, which alone is crazy. Her code would output .dot files, and then she'd create PNGs out of them. When we needed high res images, we exported to SVG, and I was able to import those into Visio. She saved me days or weeks of documenting.