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"Phase A" changes #6

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ae3930f
qc.xsd: update namespace
thomasheritage Apr 23, 2026
3febe53
qc.xsd: remove Input & Output Groups
thomasheritage Apr 23, 2026
96a81b5
qc.xsd: replace HasLocator
thomasheritage Apr 23, 2026
205b9ac
qc.xsd: add CheckResultDefinition
thomasheritage Apr 23, 2026
988d82b
qc.xsd: make Value optional on QCItemInput
thomasheritage May 7, 2026
0a40e5a
qc.xsd: remove all instances of "nillable"
thomasheritage May 7, 2026
40ed667
UML SVG: update to match qc.xsd
thomasheritage May 14, 2026
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2 changes: 2 additions & 0 deletions qc-data-model/README.md
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Expand Up @@ -15,6 +15,8 @@ The XML Schema and Class model for EBU QC Reports, QC Profiles and QC Item Defin

The class diagram for the EBU QC data model is shown below (refer to the documentation above for more details).

Note: this diagram is an SVG containing embedded draw.io data meaning it can be edited at https://www.drawio.com/

![UML Class diagram](qc-data-model.uml_diagram.drawio.svg)

## Approach to versioning of qc.xsd
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2 changes: 1 addition & 1 deletion qc-data-model/qc-data-model.uml_diagram.drawio.svg
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203 changes: 67 additions & 136 deletions qc-data-model/qc.xsd
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@@ -1,6 +1,6 @@
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:qc="tag:qc.ebu.ch,2026-01"
targetNamespace="tag:qc.ebu.ch,2026-01" elementFormDefault="qualified">
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:qc="tag:qc.ebu.ch,2026-04"
targetNamespace="tag:qc.ebu.ch,2026-04" elementFormDefault="qualified">
<xs:annotation>
<xs:documentation>Class Instances</xs:documentation>
</xs:annotation>
Expand Down Expand Up @@ -103,10 +103,9 @@
</xs:element>
<xs:element name="Inputs">
<xs:complexType>
<xs:choice minOccurs="0" maxOccurs="unbounded">
<xs:element name="Input" type="qc:QCItemInputValueType"/>
<xs:element name="Group" type="qc:QCItemInputGroupType"/>
</xs:choice>
<xs:sequence>
<xs:element name="Input" type="qc:QCItemInputType" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="ExtensionProperties" type="qc:ExtensionPropertiesType" minOccurs="0"/>
Expand Down Expand Up @@ -134,10 +133,9 @@
<xs:element name="Operator" type="qc:OperatorType" minOccurs="0"/>
<xs:element name="Outputs">
<xs:complexType>
<xs:choice minOccurs="0" maxOccurs="unbounded">
<xs:element name="Output" type="qc:QCItemOutputValueType"/>
<xs:element name="Group" type="qc:QCItemOutputGroupType"/>
</xs:choice>
<xs:sequence>
<xs:element name="Output" type="qc:QCItemOutputType" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="ExtensionProperties" type="qc:ExtensionPropertiesType" minOccurs="0"/>
Expand All @@ -162,6 +160,7 @@
<xs:element minOccurs="0" name="AnalysisMethod" type="qc:AnalysisMethodType"> </xs:element>
<xs:element name="Description" type="xs:string" minOccurs="0"/>
<xs:element name="Definition" type="xs:string"/>
<xs:element name="CheckResultDefinition" type="xs:string" minOccurs="0"/>
<xs:element name="Remarks" type="xs:string" minOccurs="0"/>
<xs:element name="Layer" type="qc:LayerType"/>
<xs:element name="Category" type="qc:CategoryType"/>
Expand Down Expand Up @@ -200,171 +199,103 @@
</xs:element>
<xs:element name="Inputs">
<xs:complexType>
<xs:choice minOccurs="0" maxOccurs="unbounded">
<xs:element name="Input" type="qc:QCItemInputValueDefinitionType"/>
<xs:element name="Group" type="qc:QCItemInputGroupDefinitionType"/>
</xs:choice>
<xs:sequence>
<xs:element name="Input" type="qc:QCItemInputDefinitionType" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="Outputs">
<xs:complexType>
<xs:choice minOccurs="0" maxOccurs="unbounded">
<xs:element name="Output" type="qc:QCItemOutputValueDefinitionType"/>
<xs:element name="Group" type="qc:QCItemOutputGroupDefinitionType"/>
</xs:choice>
<xs:sequence>
<xs:element name="Output" type="qc:QCItemOutputDefinitionType" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="ExtensionProperties" type="qc:ExtensionPropertiesType" minOccurs="0"/>
</xs:sequence>
</xs:complexType>
<xs:complexType name="QCItemInputType" abstract="true">
<xs:complexType name="QCItemInputType">
<xs:sequence>
<xs:element name="Name" type="qc:EBUQCIDType"/>
<xs:element name="Locator" type="qc:LocatorType" minOccurs="0"/>
<xs:element name="Track" type="xs:string" minOccurs="0"/>
<xs:element name="WrapperLocation" type="qc:WrapperLocationType" minOccurs="0"/>
<xs:element name="Value" minOccurs="0" type="xs:string"/>
<xs:element name="Input" type="qc:QCItemInputType" minOccurs="0" maxOccurs="unbounded"/>
<xs:element name="ExtensionProperties" type="qc:ExtensionPropertiesType" minOccurs="0"/>
</xs:sequence>
</xs:complexType>
<xs:complexType name="QCItemInputValueType">
<xs:complexContent>
<xs:extension base="qc:QCItemInputType">
<xs:sequence>
<xs:element name="Value" type="xs:string"/>
<xs:element name="ExtensionProperties" type="qc:ExtensionPropertiesType" minOccurs="0"/>
</xs:sequence>
</xs:extension>
</xs:complexContent>
</xs:complexType>
<xs:complexType name="QCItemInputGroupType">
<xs:complexContent>
<xs:extension base="qc:QCItemInputType">
<xs:sequence>
<xs:element name="Input" type="qc:QCItemInputValueType" maxOccurs="unbounded"/>
<xs:element name="ExtensionProperties" type="qc:ExtensionPropertiesType" minOccurs="0"/>
</xs:sequence>
</xs:extension>
</xs:complexContent>
</xs:complexType>
<xs:complexType name="QCItemInputDefinitionType" abstract="true">
<xs:complexType name="QCItemInputDefinitionType">
<xs:sequence>
<xs:element name="Name" type="qc:EBUQCIDType"/>
<xs:element name="Description" type="xs:string"/>
<xs:element name="Remarks" type="xs:string" minOccurs="0"/>
<xs:element name="HasLocator" type="xs:boolean" default="false"/>
<xs:element name="HasLocatorTemporal" type="xs:boolean"/>
<xs:element name="HasLocatorSpatial" type="xs:boolean"/>
<xs:element name="HasTrack" type="xs:boolean"/>
<xs:element name="HasWrapperLocation" type="xs:boolean"/>
<xs:element name="InReports" type="qc:CardinalityType"/>
<xs:element name="InChecks" type="qc:CardinalityType"/>
<xs:element name="DefaultValue" type="xs:string" minOccurs="0"/>
<xs:element name="ValueRange" type="qc:RangeType" minOccurs="0"/>
<xs:element name="Type" type="qc:DatatypeType" minOccurs="0"/>
<xs:element name="Unit" type="qc:UnitType" minOccurs="0"/>
<xs:element name="Representation" type="qc:RepresentationType" minOccurs="0"/>
<xs:element name="Input" type="qc:QCItemInputDefinitionType" minOccurs="0" maxOccurs="unbounded"/>
<xs:element name="ExtensionProperties" type="qc:ExtensionPropertiesType" minOccurs="0"/>
</xs:sequence>
</xs:complexType>
<xs:complexType name="QCItemInputValueDefinitionType">
<xs:complexContent>
<xs:extension base="qc:QCItemInputDefinitionType">
<xs:sequence>
<xs:element name="DefaultValue" type="xs:string" minOccurs="0" nillable="true"/>
<xs:element name="ValueRange" type="qc:RangeType" minOccurs="0" nillable="true"/>
<xs:element name="Type" type="qc:DatatypeType" minOccurs="0" nillable="true"/>
<xs:element name="Unit" type="qc:UnitType" minOccurs="0" nillable="true"/>
<xs:element name="Representation" type="qc:RepresentationType" minOccurs="0" nillable="true"/>
<xs:element name="ExtensionProperties" type="qc:ExtensionPropertiesType" minOccurs="0"/>
</xs:sequence>
</xs:extension>
</xs:complexContent>
</xs:complexType>
<xs:complexType name="QCItemInputGroupDefinitionType">
<xs:complexContent>
<xs:extension base="qc:QCItemInputDefinitionType">
<xs:sequence>
<xs:element name="Input" type="qc:QCItemInputValueDefinitionType"
maxOccurs="unbounded"/>
<xs:element name="ExtensionProperties" type="qc:ExtensionPropertiesType" minOccurs="0"/>
</xs:sequence>
</xs:extension>
</xs:complexContent>
</xs:complexType>
<xs:complexType name="QCItemOutputType" abstract="true">
<xs:complexType name="QCItemOutputType">
<xs:sequence>
<xs:element name="Name" type="qc:EBUQCIDType"/>
<xs:element name="Locator" type="qc:LocatorType" minOccurs="0"/>
<xs:element name="Track" type="xs:string" minOccurs="0"/>
<xs:element name="WrapperLocation" type="qc:WrapperLocationType" minOccurs="0"/>
<xs:element name="Value" minOccurs="0" type="xs:string"/>
<xs:element name="Annotation" type="qc:AnnotationType" minOccurs="0"/>
<xs:element name="VerificationMedia" type="xs:anyURI" minOccurs="0"/>
<xs:element name="Confidence" minOccurs="0">
<xs:simpleType>
<xs:restriction base="xs:decimal">
<xs:minInclusive value="0"/>
<xs:maxInclusive value="1"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="Severity" type="qc:SeverityType" minOccurs="0"/>
<xs:element name="Aliases" minOccurs="0">
<xs:simpleType>
<xs:list itemType="xs:anyURI"/>
</xs:simpleType>
</xs:element>
<xs:element name="Output" type="qc:QCItemOutputType" minOccurs="0" maxOccurs="unbounded"/>
<xs:element name="ExtensionProperties" type="qc:ExtensionPropertiesType" minOccurs="0"/>
</xs:sequence>
</xs:complexType>
<xs:complexType name="QCItemOutputValueType">
<xs:complexContent>
<xs:extension base="qc:QCItemOutputType">
<xs:sequence>
<xs:element name="Value" minOccurs="0" type="xs:string"> </xs:element>
<xs:element name="Annotation" type="qc:AnnotationType" minOccurs="0"/>
<xs:element name="VerificationMedia" type="xs:anyURI" minOccurs="0"/>
<xs:element name="Confidence" minOccurs="0">
<xs:simpleType>
<xs:restriction base="xs:decimal">
<xs:minInclusive value="0"/>
<xs:maxInclusive value="1"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="Severity" type="qc:SeverityType" minOccurs="0"/>
<xs:element minOccurs="0" name="Aliases">
<xs:simpleType>
<xs:list itemType="xs:anyURI"/>
</xs:simpleType>
</xs:element>
<xs:element name="ExtensionProperties" type="qc:ExtensionPropertiesType" minOccurs="0"/>
</xs:sequence>
</xs:extension>
</xs:complexContent>
</xs:complexType>
<xs:complexType name="QCItemOutputGroupType">
<xs:complexContent>
<xs:extension base="qc:QCItemOutputType">
<xs:sequence>
<xs:element name="Output" type="qc:QCItemOutputValueType" maxOccurs="unbounded"
/>
<xs:element name="ExtensionProperties" type="qc:ExtensionPropertiesType" minOccurs="0"/>
</xs:sequence>
</xs:extension>
</xs:complexContent>
</xs:complexType>
<xs:complexType name="QCItemOutputDefinitionType" abstract="true">
<xs:complexType name="QCItemOutputDefinitionType">
<xs:sequence>
<xs:element name="Name" type="qc:EBUQCIDType"/>
<xs:element name="Description" type="xs:string"/>
<xs:element name="Remarks" type="xs:string" minOccurs="0"/>
<xs:element name="HasLocator" type="xs:boolean" default="false"/>
<xs:element name="HasLocatorTemporal" type="xs:boolean"/>
<xs:element name="HasLocatorSpatial" type="xs:boolean"/>
<xs:element name="HasTrack" type="xs:boolean"/>
<xs:element name="HasWrapperLocation" type="xs:boolean"/>
<xs:element name="InReports" type="qc:CardinalityType"/>
<xs:element name="InChecks" type="qc:CardinalityType"/>
<xs:element name="Aliases" minOccurs="0">
<xs:simpleType>
<xs:list itemType="xs:anyURI"/>
</xs:simpleType>
</xs:element>
<xs:element name="ValueRange" type="qc:RangeType" minOccurs="0"/>
<xs:element name="Type" type="qc:DatatypeType" minOccurs="0"/>
<xs:element name="Unit" type="qc:UnitType" minOccurs="0"/>
<xs:element name="Representation" type="qc:RepresentationType" minOccurs="0"/>
<xs:element name="Output" type="qc:QCItemOutputDefinitionType" minOccurs="0" maxOccurs="unbounded"/>
<xs:element name="ExtensionProperties" type="qc:ExtensionPropertiesType" minOccurs="0"/>
</xs:sequence>
</xs:complexType>
<xs:complexType name="QCItemOutputValueDefinitionType">
<xs:complexContent>
<xs:extension base="qc:QCItemOutputDefinitionType">
<xs:sequence>
<xs:element name="Aliases" minOccurs="0">
<xs:simpleType>
<xs:list itemType="xs:anyURI"/>
</xs:simpleType>
</xs:element>
<xs:element name="ValueRange" type="qc:RangeType" minOccurs="0" nillable="true"/>
<xs:element name="Type" type="qc:DatatypeType" minOccurs="0" nillable="true"/>
<xs:element name="Unit" type="qc:UnitType" minOccurs="0" nillable="true"/>
<xs:element name="Representation" type="qc:RepresentationType" minOccurs="0" nillable="true"
/>
<xs:element name="ExtensionProperties" type="qc:ExtensionPropertiesType" minOccurs="0"/>
</xs:sequence>
</xs:extension>
</xs:complexContent>
</xs:complexType>
<xs:complexType name="QCItemOutputGroupDefinitionType">
<xs:complexContent>
<xs:extension base="qc:QCItemOutputDefinitionType">
<xs:sequence>
<xs:element name="Output" type="qc:QCItemOutputValueDefinitionType"
maxOccurs="unbounded"/>
<xs:element name="ExtensionProperties" type="qc:ExtensionPropertiesType" minOccurs="0"/>
</xs:sequence>
</xs:extension>
</xs:complexContent>
</xs:complexType>
<xs:annotation>
<xs:documentation>Structure Definitions</xs:documentation>
</xs:annotation>
Expand Down