Source string
- The module's database schema version number. -1 if the module is not installed (its tables do not exist); 0 or the largest N of the module's hook_update_N() function that has either been run or existed when the module was first installed.
Used at the following places
- Backdrop CMS: 1.26 (1), 1.27 (1), 1.28 (1), 1.29 (1)