Representing a DAG (directed acyclic graph)

Question

I need to store dependencies in a DAG. (We\'re mapping a new school curriculum at a very fine grained level)

We\'re using rails 3

Considerations

• W

Answer 1

I found this example of modeling a directed acyclic graph in SQL:

http://www.codeproject.com/KB/database/Modeling_DAGs_on_SQL_DBs.aspx?msg=3051183