anchor.diff:  | `Ignore`   | Ignores the severity of the managed entity
   |===
   
  -==== Reduce Functions
  +===== Reduce Functions
   
   Finally, the list of mapped status values are then aggregated into the operational status of the _Business Service_.
   For this operation the following _Reduce Functions_ are available:
  
positive.code: | `Indeterminate` | _1_            | Light green / `#990` | No Severity could be associated with this event.
  |===
  
  === Calculation of the operational status
  
  The operational status of a _Business Service_ is correlated in two steps.
  First, the status of each contained element is mapped to the _Business Service_.
  For _Reduction Keys_ and _IP Services_ the status is based on their alarm status.
  For contained _Business Services_ the operational status is used.
  
  ==== Map Functions
  
  The mapping can be performed by one of _Map Functions_ listed below:
  
  
negative.code: | `Threshold`     | Uses the highest severity found more often than the given threshold.
  |===
  
  ===== Operational status changes
  
  If a _Business Service_ changes its operational status an _OpenNMS_ event of the type `uei.opennms.org/bsmd/serviceOperationalStatusChanged` is fired.
  The log message of the event contains the name of the _Business Service_.
  