Config - catch-all for configuration / setup
Actor - users, org units, and their attributes
Permission - permissions and permission groups
Biblio - bib data and functions
Authority - authority data and functions
Serial - serials related tables
Asset - item and call number, mostly
Metabib - search data, mostly
Action - circ and hold state machine tables
Booking - booking/reservation state machine tables
Money - billing and payment tables and views
Action_trigger - A/T definitions, events, and output
Vandelay - import/export tables and functions
Acq - acquisitions data
Search - functions and search support tables
Container - buckets, carousels
Oai - views and functions supporting oai-pmh
Unapi - functions generating xml from data in other schemas
Query - back qstore service, holds structured data that can become arbitrary SQL
Offline - offline transactions and processing state thereof
Reporter - report templates, definitions, and scheduling tables
Rating - stores popularity badge definitions and bib ratings
Auditor - tables recording old versions of rows from many core tables