Party Scope Category Purpose Activity Calculated Greenhouse Gas Emission in ESG data model
Article
Traits
Traits for this entity are listed here.
is.CDM.entityVersion
Parameter
Value
Data type
Explanation
versionNumber
"4.3"
string
semantic version number of the entity
is.localized.describedAs
Holds the list of language specific descriptive text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
Base entity from which all ESG Data Model entities are derived.
en
A party scope / category greenhouse gas equivalent emissions activity may have multiple calculated emissions for specific greenhouse gas types, based on specific factors. The emission by greenhouse gas is captured here, then all entries are summarized as CO2e emissions in the parent activity.
entity
a reference to the constant entity holding the list of localized text
minimumObjectModelVersion
Minimum version of the object model required to fully understand the data schema used.
Parameter
Value
Data type
Explanation
versionNumber
"1.2.3"
string
is.IDM.modelVersion
Semantic version number of the IDM.
Parameter
Value
Data type
Explanation
versionNumber
"2.0.0"
string
has.schemaObjectIdentifier
The schema object has an identifier, which is a string, specified as the parameter of the trait. It allows writers to define more identification values.
Parameter
Value
Data type
Explanation
identifier
"{D20F3930-3FC3-4085-A347-90CCEF5B7225}"
string
The identifier for the schema object. There's no uniqueness guarantee enforced by CDM. It's a contract between reader and writer of the schema.
is.nativeTo.businessArea
The name of the business area from which the entity originates.
Parameter
Value
Data type
Explanation
name
"Sustainability"
string
is.localized.displayedAs
Holds the list of language specific display text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
Party Scope Category Purpose Activity Calculated Greenhouse Gas Emission
entity
a reference to the constant entity holding the list of localized text
has.entitySchemaAbstractionLevel
A level of abstraction assigned to an Entity schema. Logical schema descriptions use complex dataTypes, inheritance, and entities as attributes. Resolved descriptions contain none of those things, only final trait and attribute sets are shown. A composition schema manipulates, guides, or restates parts of logical schemas to produce one resolved schema.
The unique identifier for a Party Scope Category Purpose Greenhouse Gas Equivalent Emissions Activity within a Party Scope Category Purpose Greenhouse Gas Equivalent Emission.
The unique identifier of a Party.
First included in: Sustainability/esg-data-model/PartyScopeCategoryPurposeActivityCalculatedGreenhouseGasEmission (this entity)
Properties
Name
Value
displayName
Party ID
description
The unique identifier of a Party.
isPrimaryKey
true
dataFormat
int64
Traits
List of traits for the PartyId attribute are listed here.
is.dataFormat.integer is.dataFormat.big
indicates an atomic but multi-unit version of a fundamental type such as a multi byte encoded character, a double precision float, a long integer.
is.identifiedBy
names a specific identity attribute to use with an entity
is.linkedEntity.identifier
Marks the attributes that hold foreign key references to a linked (used as an attribute) entity. This attribute is added to the resolved entity to enumerate the referenced entities.
a reference to the constant entity holding the list of entity references
is.localized.displayedAs
Holds the list of language specific display text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
Party ID
entity
a reference to the constant entity holding the list of localized text
is.localized.describedAs
Holds the list of language specific descriptive text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
The unique identifier of a Party.
entity
a reference to the constant entity holding the list of localized text
has.schemaObjectIdentifier
The schema object has an identifier, which is a string, specified as the parameter of the trait. It allows writers to define more identification values.
Parameter
Value
Data type
Explanation
identifier
"{477A6EA0-D2CB-426B-9B57-C6C0612F9230}"
string
The identifier for the schema object. There's no uniqueness guarantee enforced by CDM. It's a contract between reader and writer of the schema.
is.dataFormat.integer is.dataFormat.big
indicates an atomic but multi-unit version of a fundamental type such as a multi byte encoded character, a double precision float, a long integer.
The unique identifier of a Greenhouse Gas Emissions Scope.
First included in: Sustainability/esg-data-model/PartyScopeCategoryPurposeActivityCalculatedGreenhouseGasEmission (this entity)
Properties
Name
Value
displayName
Greenhouse Gas Emissions Scope ID
description
The unique identifier of a Greenhouse Gas Emissions Scope.
isPrimaryKey
true
dataFormat
int32
Traits
List of traits for the GreenhouseGasEmissionsScopeId attribute are listed here.
is.dataFormat.integer is.identifiedBy
names a specific identity attribute to use with an entity
is.linkedEntity.identifier
Marks the attributes that hold foreign key references to a linked (used as an attribute) entity. This attribute is added to the resolved entity to enumerate the referenced entities.
a reference to the constant entity holding the list of entity references
is.localized.displayedAs
Holds the list of language specific display text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
Greenhouse Gas Emissions Scope ID
entity
a reference to the constant entity holding the list of localized text
is.localized.describedAs
Holds the list of language specific descriptive text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
The unique identifier of a Greenhouse Gas Emissions Scope.
entity
a reference to the constant entity holding the list of localized text
has.schemaObjectIdentifier
The schema object has an identifier, which is a string, specified as the parameter of the trait. It allows writers to define more identification values.
Parameter
Value
Data type
Explanation
identifier
"{594FD78B-6263-4A63-8D3B-8AD472DA422E}"
string
The identifier for the schema object. There's no uniqueness guarantee enforced by CDM. It's a contract between reader and writer of the schema.
The unique identifier of a Greenhouse Gas Emissions Category.
First included in: Sustainability/esg-data-model/PartyScopeCategoryPurposeActivityCalculatedGreenhouseGasEmission (this entity)
Properties
Name
Value
displayName
Greenhouse Gas Emissions Category ID
description
The unique identifier of a Greenhouse Gas Emissions Category.
isPrimaryKey
true
dataFormat
int32
Traits
List of traits for the GreenhouseGasEmissionsCategoryId attribute are listed here.
is.dataFormat.integer is.identifiedBy
names a specific identity attribute to use with an entity
is.linkedEntity.identifier
Marks the attributes that hold foreign key references to a linked (used as an attribute) entity. This attribute is added to the resolved entity to enumerate the referenced entities.
a reference to the constant entity holding the list of entity references
is.localized.displayedAs
Holds the list of language specific display text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
Greenhouse Gas Emissions Category ID
entity
a reference to the constant entity holding the list of localized text
is.localized.describedAs
Holds the list of language specific descriptive text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
The unique identifier of a Greenhouse Gas Emissions Category.
entity
a reference to the constant entity holding the list of localized text
has.schemaObjectIdentifier
The schema object has an identifier, which is a string, specified as the parameter of the trait. It allows writers to define more identification values.
Parameter
Value
Data type
Explanation
identifier
"{F33CD62C-B527-4C9C-AFDF-CDC50A17D2F4}"
string
The identifier for the schema object. There's no uniqueness guarantee enforced by CDM. It's a contract between reader and writer of the schema.
The unique identifier of a Greenhouse Gas Emissions Purpose Type.
First included in: Sustainability/esg-data-model/PartyScopeCategoryPurposeActivityCalculatedGreenhouseGasEmission (this entity)
Properties
Name
Value
displayName
Greenhouse Gas Emissions Purpose Type ID
description
The unique identifier of a Greenhouse Gas Emissions Purpose Type.
isPrimaryKey
true
dataFormat
int32
Traits
List of traits for the GreenhouseGasEmissionsPurposeTypeId attribute are listed here.
is.dataFormat.integer is.identifiedBy
names a specific identity attribute to use with an entity
is.linkedEntity.identifier
Marks the attributes that hold foreign key references to a linked (used as an attribute) entity. This attribute is added to the resolved entity to enumerate the referenced entities.
a reference to the constant entity holding the list of entity references
is.localized.displayedAs
Holds the list of language specific display text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
Greenhouse Gas Emissions Purpose Type ID
entity
a reference to the constant entity holding the list of localized text
is.localized.describedAs
Holds the list of language specific descriptive text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
The unique identifier of a Greenhouse Gas Emissions Purpose Type.
entity
a reference to the constant entity holding the list of localized text
has.schemaObjectIdentifier
The schema object has an identifier, which is a string, specified as the parameter of the trait. It allows writers to define more identification values.
Parameter
Value
Data type
Explanation
identifier
"{8468BD1F-5F73-4785-8DFC-D7B76C485086}"
string
The identifier for the schema object. There's no uniqueness guarantee enforced by CDM. It's a contract between reader and writer of the schema.
The unique identifier of a fuel type.
First included in: Sustainability/esg-data-model/PartyScopeCategoryPurposeActivityCalculatedGreenhouseGasEmission (this entity)
Properties
Name
Value
displayName
Fuel Type ID
description
The unique identifier of a fuel type.
isPrimaryKey
true
dataFormat
int32
Traits
List of traits for the FuelTypeId attribute are listed here.
is.dataFormat.integer is.identifiedBy
names a specific identity attribute to use with an entity
is.linkedEntity.identifier
Marks the attributes that hold foreign key references to a linked (used as an attribute) entity. This attribute is added to the resolved entity to enumerate the referenced entities.
a reference to the constant entity holding the list of entity references
is.localized.displayedAs
Holds the list of language specific display text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
Fuel Type ID
entity
a reference to the constant entity holding the list of localized text
is.localized.describedAs
Holds the list of language specific descriptive text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
The unique identifier of a fuel type.
entity
a reference to the constant entity holding the list of localized text
has.schemaObjectIdentifier
The schema object has an identifier, which is a string, specified as the parameter of the trait. It allows writers to define more identification values.
Parameter
Value
Data type
Explanation
identifier
"{AC91B8EE-E40F-40C5-A547-538DBC1D4D30}"
string
The identifier for the schema object. There's no uniqueness guarantee enforced by CDM. It's a contract between reader and writer of the schema.
The unique identifier of a Metric Purpose.
First included in: Sustainability/esg-data-model/PartyScopeCategoryPurposeActivityCalculatedGreenhouseGasEmission (this entity)
Properties
Name
Value
displayName
Metric Purpose ID
description
The unique identifier of a Metric Purpose.
isPrimaryKey
true
dataFormat
int32
Traits
List of traits for the MetricPurposeId attribute are listed here.
is.dataFormat.integer is.identifiedBy
names a specific identity attribute to use with an entity
is.linkedEntity.identifier
Marks the attributes that hold foreign key references to a linked (used as an attribute) entity. This attribute is added to the resolved entity to enumerate the referenced entities.
a reference to the constant entity holding the list of entity references
is.localized.displayedAs
Holds the list of language specific display text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
Metric Purpose ID
entity
a reference to the constant entity holding the list of localized text
is.localized.describedAs
Holds the list of language specific descriptive text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
The unique identifier of a Metric Purpose.
entity
a reference to the constant entity holding the list of localized text
has.schemaObjectIdentifier
The schema object has an identifier, which is a string, specified as the parameter of the trait. It allows writers to define more identification values.
Parameter
Value
Data type
Explanation
identifier
"{22E015B9-45CA-4467-AA91-C4572D5D4442}"
string
The identifier for the schema object. There's no uniqueness guarantee enforced by CDM. It's a contract between reader and writer of the schema.
The unique identifier of a calculation algorithm.
First included in: Sustainability/esg-data-model/PartyScopeCategoryPurposeActivityCalculatedGreenhouseGasEmission (this entity)
Properties
Name
Value
displayName
Calculation Algorithm ID
description
The unique identifier of a calculation algorithm.
isPrimaryKey
true
dataFormat
int32
Traits
List of traits for the CalculationAlgorithmId attribute are listed here.
is.dataFormat.integer is.identifiedBy
names a specific identity attribute to use with an entity
is.linkedEntity.identifier
Marks the attributes that hold foreign key references to a linked (used as an attribute) entity. This attribute is added to the resolved entity to enumerate the referenced entities.
a reference to the constant entity holding the list of entity references
is.localized.displayedAs
Holds the list of language specific display text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
Calculation Algorithm ID
entity
a reference to the constant entity holding the list of localized text
is.localized.describedAs
Holds the list of language specific descriptive text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
The unique identifier of a calculation algorithm.
entity
a reference to the constant entity holding the list of localized text
has.schemaObjectIdentifier
The schema object has an identifier, which is a string, specified as the parameter of the trait. It allows writers to define more identification values.
Parameter
Value
Data type
Explanation
identifier
"{2E9A7916-BC17-48A3-BEBE-5E761DBC1634}"
string
The identifier for the schema object. There's no uniqueness guarantee enforced by CDM. It's a contract between reader and writer of the schema.
is.linkedEntity.identifier
Marks the attributes that hold foreign key references to a linked (used as an attribute) entity. This attribute is added to the resolved entity to enumerate the referenced entities.
a reference to the constant entity holding the list of entity references
is.localized.displayedAs
Holds the list of language specific display text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
Period Start Date
entity
a reference to the constant entity holding the list of localized text
is.localized.describedAs
Holds the list of language specific descriptive text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
The period start date.
entity
a reference to the constant entity holding the list of localized text
has.schemaObjectIdentifier
The schema object has an identifier, which is a string, specified as the parameter of the trait. It allows writers to define more identification values.
Parameter
Value
Data type
Explanation
identifier
"{F3DF75FE-8083-4117-85C0-58EF34828037}"
string
The identifier for the schema object. There's no uniqueness guarantee enforced by CDM. It's a contract between reader and writer of the schema.
is.linkedEntity.identifier
Marks the attributes that hold foreign key references to a linked (used as an attribute) entity. This attribute is added to the resolved entity to enumerate the referenced entities.
a reference to the constant entity holding the list of entity references
is.localized.displayedAs
Holds the list of language specific display text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
Period End Date
entity
a reference to the constant entity holding the list of localized text
is.localized.describedAs
Holds the list of language specific descriptive text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
The period end date.
entity
a reference to the constant entity holding the list of localized text
has.schemaObjectIdentifier
The schema object has an identifier, which is a string, specified as the parameter of the trait. It allows writers to define more identification values.
Parameter
Value
Data type
Explanation
identifier
"{388148A5-1161-4020-818A-126DA659BC71}"
string
The identifier for the schema object. There's no uniqueness guarantee enforced by CDM. It's a contract between reader and writer of the schema.
The unique identifier for a Party Scope Category Purpose Greenhouse Gas Equivalent Emissions Activity within a Party Scope Category Purpose Greenhouse Gas Equivalent Emission.
First included in: Sustainability/esg-data-model/PartyScopeCategoryPurposeActivityCalculatedGreenhouseGasEmission (this entity)
Properties
Name
Value
displayName
Party Scope Category Purpose Greenhouse Gas Equivalent Emissions Activity ID
description
The unique identifier for a Party Scope Category Purpose Greenhouse Gas Equivalent Emissions Activity within a Party Scope Category Purpose Greenhouse Gas Equivalent Emission.
isPrimaryKey
true
dataFormat
int64
Traits
List of traits for the PartyScopeCategoryPurposeGreenhouseGasEquivalentEmissionsActivityId attribute are listed here.
is.dataFormat.integer is.dataFormat.big
indicates an atomic but multi-unit version of a fundamental type such as a multi byte encoded character, a double precision float, a long integer.
is.identifiedBy
names a specific identity attribute to use with an entity
is.linkedEntity.identifier
Marks the attributes that hold foreign key references to a linked (used as an attribute) entity. This attribute is added to the resolved entity to enumerate the referenced entities.
a reference to the constant entity holding the list of entity references
is.localized.displayedAs
Holds the list of language specific display text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
Party Scope Category Purpose Greenhouse Gas Equivalent Emissions Activity ID
entity
a reference to the constant entity holding the list of localized text
is.localized.describedAs
Holds the list of language specific descriptive text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
The unique identifier for a Party Scope Category Purpose Greenhouse Gas Equivalent Emissions Activity within a Party Scope Category Purpose Greenhouse Gas Equivalent Emission.
entity
a reference to the constant entity holding the list of localized text
has.schemaObjectIdentifier
The schema object has an identifier, which is a string, specified as the parameter of the trait. It allows writers to define more identification values.
Parameter
Value
Data type
Explanation
identifier
"{178EB29E-7B48-4744-AF89-FDA41D0404E8}"
string
The identifier for the schema object. There's no uniqueness guarantee enforced by CDM. It's a contract between reader and writer of the schema.
is.dataFormat.integer is.dataFormat.big
indicates an atomic but multi-unit version of a fundamental type such as a multi byte encoded character, a double precision float, a long integer.
The unique identifier (key) of a greenhouse gas.
First included in: Sustainability/esg-data-model/PartyScopeCategoryPurposeActivityCalculatedGreenhouseGasEmission (this entity)
Properties
Name
Value
displayName
Greenhouse Gas ID
description
The unique identifier (key) of a greenhouse gas.
isPrimaryKey
true
dataFormat
int32
Traits
List of traits for the GreenhouseGasId attribute are listed here.
is.dataFormat.integer is.identifiedBy
names a specific identity attribute to use with an entity
is.linkedEntity.identifier
Marks the attributes that hold foreign key references to a linked (used as an attribute) entity. This attribute is added to the resolved entity to enumerate the referenced entities.
a reference to the constant entity holding the list of entity references
is.localized.displayedAs
Holds the list of language specific display text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
Greenhouse Gas ID
entity
a reference to the constant entity holding the list of localized text
is.localized.describedAs
Holds the list of language specific descriptive text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
The unique identifier (key) of a greenhouse gas.
entity
a reference to the constant entity holding the list of localized text
has.schemaObjectIdentifier
The schema object has an identifier, which is a string, specified as the parameter of the trait. It allows writers to define more identification values.
Parameter
Value
Data type
Explanation
identifier
"{DB1EBB8B-8932-4F0F-9C78-B105ABAA6B2E}"
string
The identifier for the schema object. There's no uniqueness guarantee enforced by CDM. It's a contract between reader and writer of the schema.
Factor For Calculated Emissions is the numeric factor that was used in the calculation of the emissions.
First included in: Sustainability/esg-data-model/PartyScopeCategoryPurposeActivityCalculatedGreenhouseGasEmission (this entity)
Properties
Name
Value
displayName
Factor For Calculated Emissions
description
Factor For Calculated Emissions is the numeric factor that was used in the calculation of the emissions.
dataFormat
decimal
isNullable
true
Traits
List of traits for the FactorForCalculatedEmissions attribute are listed here.
is.dataFormat.numeric.shaped
for setting the exact precision and scale of numeric values
Parameter
Value
Data type
Explanation
precision
"22"
integer
the total number of significant digits
scale
"10"
integer
the number of digits to the right of the decimal place
has.schemaObjectIdentifier
The schema object has an identifier, which is a string, specified as the parameter of the trait. It allows writers to define more identification values.
Parameter
Value
Data type
Explanation
identifier
"{BAE9F6BD-02F8-41F5-AB17-2EE93F6E5E6E}"
string
The identifier for the schema object. There's no uniqueness guarantee enforced by CDM. It's a contract between reader and writer of the schema.
is.nullable
The attribute value can be set to NULL.
is.localized.displayedAs
Holds the list of language specific display text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
Factor For Calculated Emissions
entity
a reference to the constant entity holding the list of localized text
is.localized.describedAs
Holds the list of language specific descriptive text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
Factor For Calculated Emissions is the numeric factor that was used in the calculation of the emissions.
entity
a reference to the constant entity holding the list of localized text
is.dataFormat.numeric.shaped
for setting the exact precision and scale of numeric values
The greenhouse gas emission units.
First included in: Sustainability/esg-data-model/PartyScopeCategoryPurposeActivityCalculatedGreenhouseGasEmission (this entity)
Properties
Name
Value
displayName
Greenhouse Gas Emissions
description
The greenhouse gas emission units.
dataFormat
decimal
isNullable
true
Traits
List of traits for the GreenhouseGasEmissions attribute are listed here.
is.dataFormat.numeric.shaped
for setting the exact precision and scale of numeric values
Parameter
Value
Data type
Explanation
precision
"22"
integer
the total number of significant digits
scale
"10"
integer
the number of digits to the right of the decimal place
has.schemaObjectIdentifier
The schema object has an identifier, which is a string, specified as the parameter of the trait. It allows writers to define more identification values.
Parameter
Value
Data type
Explanation
identifier
"{5A003403-EAB8-4AB7-8200-ECC6DDE51395}"
string
The identifier for the schema object. There's no uniqueness guarantee enforced by CDM. It's a contract between reader and writer of the schema.
is.nullable
The attribute value can be set to NULL.
is.localized.displayedAs
Holds the list of language specific display text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
Greenhouse Gas Emissions
entity
a reference to the constant entity holding the list of localized text
is.localized.describedAs
Holds the list of language specific descriptive text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
The greenhouse gas emission units.
entity
a reference to the constant entity holding the list of localized text
is.dataFormat.numeric.shaped
for setting the exact precision and scale of numeric values
The unique identifier of a Unit Of Measure.
First included in: Sustainability/esg-data-model/PartyScopeCategoryPurposeActivityCalculatedGreenhouseGasEmission (this entity)
Properties
Name
Value
displayName
Greenhouse Gas Emissions Unit Of Measure ID
description
The unique identifier of a Unit Of Measure.
dataFormat
int32
isNullable
true
Traits
List of traits for the GreenhouseGasEmissionsUnitOfMeasureId attribute are listed here.
is.dataFormat.integer is.nullable
The attribute value can be set to NULL.
is.localized.displayedAs
Holds the list of language specific display text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
Greenhouse Gas Emissions Unit Of Measure ID
entity
a reference to the constant entity holding the list of localized text
is.localized.describedAs
Holds the list of language specific descriptive text for an object.
Parameter
Value
Data type
Explanation
localizedDisplayText
languageTag
displayText
en
The unique identifier of a Unit Of Measure.
entity
a reference to the constant entity holding the list of localized text
is.linkedEntity.identifier
Marks the attributes that hold foreign key references to a linked (used as an attribute) entity. This attribute is added to the resolved entity to enumerate the referenced entities.
a reference to the constant entity holding the list of entity references
has.schemaObjectIdentifier
The schema object has an identifier, which is a string, specified as the parameter of the trait. It allows writers to define more identification values.
Parameter
Value
Data type
Explanation
identifier
"{D7A791F3-39A0-4ABC-8BCB-28501F1A5657}"
string
The identifier for the schema object. There's no uniqueness guarantee enforced by CDM. It's a contract between reader and writer of the schema.