A system and method of relationship management for data modeling in an integrated development environment is provided. A method of incorporating a program code file includes generating a relational schema of symbols in the program code file based on a framework for models in the integrated development environment, the schema comprising at least two related tables; determining a relationship between the at least two tables in the relational schema; adding definitions from the program code file for symbols in the relational schema to a definition set retaining definitions of symbols; and producing proxy definitions for use with the definition set for each symbol in the program code file without a definition in the definition set.