The
DGraph.WhyPrecedenceRuleFired
property value has a
multi-part format that is made up of a list of trigger reasons and trigger
values that were evaluated for each precedence rule.
The
DGraph.WhyPrecedenceRuleFired
property is returned as a
JSON object with the following format:
[ { "triggerReason" : "<Reason>", "triggerDimensionValues" : ["<DimensionID>, ... "], "ruleType" : "<Type>", "sourceDimension" : "<DimensionName>", "sourceDimensionValue" : "<DimensionID>" }, ... ]
The following table describes the reporting values in the
DGraph.WhyPrecedenceRuleFired
property. The specific
reporting values depend on the precedence rules in the MDEX Engine and how many
rules the MDEX Engine evaluated for the current set of available refinement
dimensions.
The
DGraph.WhyPrecedenceRuleFired
property may contain any
number of
triggerReason
reporting values. However, there is one
exception in the case where the value of
triggerReason
is
default
. In that case, there would be a single
triggerReason
value.
Here is an example query that contains at least the following two URL
query parameters:
N=310002&Nx=whyprecedencerulefired
. The value of
310002 is the dimension value ID that triggers a precedence rule for dimension
300000. The query produces a result with a root dimension value that contains
the following
DGraph.WhyPrecedenceRuleFired
property:
<Dimension Id=300000 Name=Number of Digits> <Root> <DimVal Name="Number of Digits" Id=300000> <PropertyList Size=1> <Property Key="DGraph.WhyPrecedenceRuleFired" Value="[ { "triggerReason" : "explicitSelection", "triggerDimensionValues" : [310002] } ]">