The first thing I always do is 'read' the data model. What are the tables called? What are the relationships and cardinalities. Combining that with the source c

The first thing I always do is 'read' the data model. What are the tables called? What are the relationships and cardinalities. Combining that with the source can give you a head start into being able to extract relevant conceptual information that's (strangely) rarely documented.