# PostgSail ERD The Entity-Relationship Diagram (ERD) provides a graphical representation of database tables, columns, and inter-relationships. ERD can give sufficient information for the database administrator to follow when developing and maintaining the database. ## A global overview ![API Schema](https://raw.githubusercontent.com/xbgmsharp/postgsail/main/ERD/postgsail.pgerd.png "API Schema") ## Further There is 3 main schemas: - API Schema ERD - tables - metrics - logbook - ... - functions - ... ![API Schem](https://raw.githubusercontent.com/xbgmsharp/postgsail/main/ERD/ERD_schema_api.png "API Schema") - Auth Schema ERD - tables - accounts - vessels - ... - functions - ... ![Auth Schema](https://raw.githubusercontent.com/xbgmsharp/postgsail/main/ERD/ERD_schema_auth.png "Auth Schema") - Public Schema ERD - tables - app_settings - tpl_messages - ... - functions - ... ![Public Schema](https://raw.githubusercontent.com/xbgmsharp/postgsail/main/ERD/ERD_schema_public.png "Public Schema")