URI: http://www.qualityml.org/1.0/metrics/items
Name: Items
Alternative names:  
Definition:

Number of items

Parameters: value (choice of: indicator (boolean), count (int), rate (real, attribute: max (real)))
Source: ISO 19157
Categories: Completeness, Logical consistency, Positional accuracy, Temporal accuracy, Thematic accuracy
Further information:  
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="Items" type="qml:ItemsType" substitutionGroup="un:AbstractSummaryStatistic"/>
<complexType name="ItemsType">
<complexContent>
<extension base="un:AbstractSummaryStatisticType">
<sequence>
<choice>
<element name="indicator" type="qml:BooleanNumbersType"/>
<element name="count" type="un:NaturalNumbersType"/>
<element name="rate" type="qml:RateType"/>
</choice>
</sequence>
</extension>
</complexContent>
</complexType>

XML example:

Missing Quality Measure 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">

Indicator

<qml:Items>
<qml:indicator>true</qml:indicator>
</qml:Items>

Count

<qml:Items>
<qml:count>5</qml:count>
</qml:Items>

Rate

<qml:Items>
<qml:rate max="100">66</qml:rate>
</qml:Items>
JSON example:
N/A
API example:
N/A
Value constraints: categories: any string
counts: any positive natural number