Manual:$wgEventLoggingSchemas

{{TNT|SettingSummary
 * name=EventLoggingSchemas
 * range= Associative array of schema name => ve

Details
  offers a quick way to register  schemas.

The array keys are the schema names (ie. the page names on the event logging central wiki, such as m:Special:PrefixIndex/Schema:), the values are the schema versions (ie. the page revisions).