+
+-----
+
+**TODO** list:
+
+ - functional integrity constraints (CIF)
+ - inter-relations constraints (or, and, xor...)
+ - inheritance with the right symbol (triangle)
+ - put online somewhere (user enter graph description and get SVG + SQL)
+
+*Implementation note:* temporary dependency to [underscore](http://underscorejs.org/); good library but used so far only for its shuffle() method.