This appendix describes the database tables and fields that make up Drupal core. The descriptions are taken from the
hook_schema() implementations in the core modules'
.install files, with minor changes for clarity. The information is reproduced here for your convenience.
You can find current table definitions in your Drupal installation within the schema hook of a module's
.install file or using the contributed schema module, found at
http://drupal.org/project/schema. Definitions for non-module core tables are in the
modules/system/system.install file. If a table is used primarily by a specific module, that module is listed in parentheses after the table name. References to other tables show table names in ...