Icinga 2 DSL Feature: Namespaces coming in v2.10
Under the hood, Icinga 2 uses many constants and reserved keywords, e.g. “Critical” or “Zone” which are respected by the config parser and compiler. This sometimes leads to errors when users accidentally override such things, or re-define their own global constants. v2.10 introduces namespaces for this purpose, and ensures that such accidents won’t happen anymore.