URI: http://www.qualityml.org/1.0/metrics/NormalizedRootMeanSquareError
Name: Normalized root mean square error (NRMSE)
Alternative names: RMSE normalized
Definition:

Measure of the differences between values predicted by a model or an estimator and the values actually observed.

NRMSE = RMSE / (xmax - xmin)

where xmax = maximum observed value; xmin = minimum observed value

Parameters:  
Source:  
Categories: Positional accuracy
Further information: https://en.wikipedia.org/wiki/Root-mean-square_deviation
XML schema:
<schema xmlns:qml="http://www.qualityml.org/1.0" 
xmlns:un="http://www.uncertml.org/2.0" 
xmlns="http://www.w3.org/2001/XMLSchema" targetNamespace="http://www.qualityml.org/1.0" 
elementFormDefault="qualified" attributeFormDefault="unqualified">
<import namespace="http://www.uncertml.org/2.0" schemaLocation="../../uncertml/2.0/uncertml.xsd"/>

<element name="NormalizedRootMeanSquare" type="qml:ValuesSummaryStatisticType" substitutionGroup="un:AbstractSummaryStatistic"/>

XML example:
<un:StatisticsCollection xmlns:qml="http://www.qualityml.org/1.0"                                
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"                 
xsi:schemaLocation="http://www.qualitymlorg/schemas/qualityml/1.0/qualityml.xsd"> 
<qml:NormalizedRootMeanSquare>
<qml:values>0.45</qml:values>
</qml:NormalizedRootMeanSquare>
JSON example:
N/A
API example:
N/A
Value constraints: categories: any string
counts: any positive natural number