What is the reference to registry() function in a rule condition mean? (4255016)

A rule condition refers to a registry() function. For example the DBO - Days Since Full Backup rule has the following expression in the Warning condition:

if((scope.backup_type=="DB FULL")&&(#days_since_backup#>=registry("DBO_Days_Since_Full_Backup_Low"))

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The name between the brackets in registry() refers to a Foglight Registry variable. For example in the example above the variable is DBO_Days_Since_Full_Backup_Low

You can update the variable via the Manage Registry Variables dashboard.