| create_erd | Create ERD Object |
| format_relationships | Format Relationships as R Code |
| is_valid_erd | Test Whether an ERD Is Valid |
| perform_join | Use inner join (unless the other is specified) |
| render_erd | Render ERD |
| suggest_relationships | Suggest ERD Relationships From a List of Data Frames |
| validate_erd | Validate an ERD Object |