Warning: mysqli::query(): (HY000/1194): Table 'wiki_objectcache' is marked as crashed and should be repaired in /var/www/html/w/includes/libs/rdbms/database/DatabaseMysqli.php on line 46 Reference - The Free Freshwater and Saltwater Aquarium Encyclopedia Anyone Can Edit - The Aquarium Wiki
"Reference" is a container type that allows to record additional information (e.g. provenance data) about a value assignment. Further information and examples can be found on the help page.