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

Further

There is 3 main schemas:

API Schema ERD
- tables
  - metrics
  - logbook
  - ...
- functions
  - ... ![API Schem](https://raw.githubusercontent.com/xbgmsharp/postgsail/main/ERD/signalk - api.png "API Schema")
Auth Schema ERD
- tables
  - accounts
  - vessels
  - ...
- functions
  - ... ![Auth Schema](https://raw.githubusercontent.com/xbgmsharp/postgsail/main/ERD/signalk - auth.png "Auth Schema")
Public Schema ERD
- tables
  - app_settings
  - tpl_messages
  - ...
- functions
  - ... ![Public Schema](https://raw.githubusercontent.com/xbgmsharp/postgsail/main/ERD/signalk - public.png "Public Schema")