2. The method of claim 1 , further comprising: converting the cumulative schema into a relational schema; and presenting the relational schema to the user, wherein the query from the user is constructed over the relational schema.
2. The method of claim 1 , further comprising: converting the cumulative schema into a relational schema; and presenting the relational schema to the user, wherein the query from the user is constructed over the relational schema. 19. The method of claim 2 , wherein the relational schema is a structured query language (SQL) schema, and the query is an SQL query.