The AAS metamodel contains model elements representing security aspects. These are not part of this version of the companion specification and a matter of the next revision.

Table 11 defines the root class AASAssetAdministrationShellType of the OPC UA Asset Administration Shell.

Note: For a single submodel either a <Submodel> component or a <SubmodelReference> component is created. Submodel references are used in case that the submodel is deployed on a different OPC UA Server, i.e. it is not located in the address space. Otherwise the submodel can be directly added.

Table 11 – AASAssetAdministrationShellType Definition

Attribute

Value

BrowseName

AASAssetAdministrationShellType

IsAbstract

False

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

Subtype of the BaseObjectType defined in OPC 10000-5, i.e. inheriting the InstanceDeclarations of that Node.

0:HasInterface

ObjectType

IAASIdentifiableType

-

-

-

0:HasComponent

Object

<DataSpecification>

AASReferenceType

OP

0:HasComponent

Object

Asset

-

AASAssetType

M

0:HasComponent

Object

<Submodel>

-

AASSubmodelType

OP

0:HasComponent

Object

<SubmodelReference>

-

AASReferenceType

OP

0:HasComponent

Object

<ConceptDictionary>

-

AASConceptDictionaryType

OP

0:HasComponent

Object

<View>

-

AASViewType

OP

0:HasComponent

Object

DerivedFrom

-

AASReferenceType

O

0:HasDictionaryEntry

Object

Admin-shell.io/aas/2/0/AssetAdministrationShell

AASIriConceptDescriptionType

The components of the AASAssetAdministrationShellType have additional references which are defined in Table 12.

Table 12 – AASAssetAdministrationShellType Additional References

Source Path

Reference Type

Is Forward

Target Path

<DataSpecification>

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/hasDataSpecification/dataSpecification

Asset

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/AssetAdministrationShell/asset

<Submodel>

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/AssetAdministrationShell/submodels

<SubmodelReference>

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/AssetAdministrationShell/submodels

<ConceptDictionary>

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/AssetAdministrationShell/conceptDictionaries

<View>

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/AssetAdministrationShell/views

DerivedFrom

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/AssetAdministrationShell/derivedFrom

For AAS references as used in ReferenceElement of RelationshipElement a new non-hierarchial ReferenceType “AASReference” is introduced (Figure 9). The OPC UA ReferenceType 0:HasComponent is not directly used to reference an element because OPC UA references can only reference elements in the same address space. For more details please see rule 24 in section 5.1.

image014.png

Figure 9 – AASReference type

The details of the AASReferenceType are defined in Table 13.

Table 13 – AASReferenceType Definition

Attribute

Value

BrowseName

AASReferenceType

IsAbstract

False

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

Subtype of the BaseObjectType defined in OPC 10000-5, i.e. inheriting the InstanceDeclarations of that Node.

0:HasProperty

Variable

Keys

AASKeyDataType []

0:PropertyType

M

AASReference

Object

<Referable>

-

0:BaseObjectType

OP

0:HasDictionaryEntry

Object

Admin-shell.io/aas/2/0/Reference

AASIriConceptDescriptionType

The components of the AASReferenceType have additional references which are defined inTable 14.

Table 14 – AASReferenceType Additional References

Source Path

Reference Type

Is Forward

Target Path

Keys

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/Reference/keys

The AASReference to a Referable does not have a counterpart in the metamodel of the asset administration shell. It was added to this specification to allow a direct link to an OPC Object if available that corresponds to the one specified via the keys.

Objects of the AASReferenceType can reference another referable node instance. Instances of the following ObjectTypes can be referenced:

  • AASAccessPermissionRuleType
  • AASAnnotatedRelationshipElementType
  • AASAssetAdministrationShellType
  • AASAssetType
  • 0:BaseEventType
  • AASBlobType
  • AASCapabilityType
  • AASConceptDictionaryType
  • AASCustomConceptDescriptionType
  • AASFileType
  • AASEntityType
  • AASEventType
  • AASIrdiConceptDescriptionType
  • AASIriConceptDescriptionType
  • AASMultiLanguagePropertyType
  • AASOperationType
  • AASPropertyType
  • AASRangeType
  • AASReferenceElementType
  • AASRelationshipElementType
  • AASSubmodelType
  • AASSubmodelElementType
  • AASSubmodelElementCollectionType
  • AASViewType

The identification concept serves to clearly identify all AAS elements. In principle, a distinction can be made between the following partial identification concepts, which differ in their validity area (Figure 10).

• Globally unique identification, e.g. IRDI or URI - this is called "Identifiable"

• Locally unique identification (instance-related ID valid only in the inner context of an AAS) - this is called "Referable"

• semantic referencing (reference to a conceptual library (dictionary / repository))

In Figure 10 these are shown. The light blue backed rectangles are each AASs. The attributes of the AAS named in the upper section (AAS - Asset Administration Shell, Asset and Submodel) have a globally valid identifier. In addition to the identifier itself, the identifier is also given its type, which can be URI, IRDI or Custom (manufacturer-specific). The identifiers of these AAS elements are thus unique. This is necessary because it is the entry point into the AAS. If this is compared with an OPC UA Server URI, then the same applies since the validity in the namespace of the OPC UA server must also be unique.

image015.png

Figure 10 – Identification concepts for AAS

The middle section of Figure 10 shows AAS elements that have locally unique identifiers. This allows for e.g. the same properties can be present several times and also submodels can be used again and again. The validity of this identification concept is only in its context (namespace), i.e. along the composition from the globally unique identifiers until the individual instances. An example of idShort is "MaxTemp" and for the composition in the identification: "urn: PROFIBUS: PROFIBUS-PA: V3-02: Parameter: 1: 1: MaxTemp # 0002".

With these two concepts, the identification of an AAS, i.e. the addressing is clearly possible. However, as with the example of the PROFIBUS PA profile, the name MaxTemp is unique only in this profile. In the planning documents of the plants there are also specifications for the maximum temperature, as well as in the manual of the transmitter. All three parameters correspond to the same understanding, but they are not automatically interconvertible by machine. This is where the third identification concept of AAS comes in. The lower part of Figure 10 shows the semantic references that refer to dictionaries, which are feature catalogs that store the understanding of the properties and important attributes (data type, unit of measurement, ...). From selected AAS elements e.g. submodel and property can be checked if the same thing is meant despite different naming. It is possible to specify only the semantic reference and it is expected that the user can interpret this. However, it is also possible to embed the corresponding dictionary in the AAS.

For these three identification principles, there are corresponding model elements in the AAS metamodel. It is also possible that an element e.g. a submodel has both a local identifier and a semantic reference. The reserved word "keys" encapsulates each of the attributes of the identifier. The attribute "local" allows elements to be located outside the AAS where it is identifiable. Local = "TRUE" means the identifier value "Value" refers to the same AAS, Local = "FALSE" means the identifier value "Value" refers to an external location. The “Local” variable is defined in AASKeyDataType (Table 70).

Figure 11 shows an overview about the IAASReferableType ObjectType.

image016.png

Figure 11 – OPC UA mapping of the identification concept

For the identification concept, a mapping to the OPC UA information model is shown in (Figure 11). It can be seen that "Identifiable" is a specialization of "Referable". The identifiable identification contains not only the identifier but also the type and optionally a version and revision. The Category for the Referable Identifier are inherited. What is striking is that in OPC UA modelling at this level, the formal idShort designation is not visible. idShort is always mapped to the browsing name of an OPC UA node by the generally valid rule (see). In this way, the locally valid identification customary in OPC UA can be used.

Overall, this AAS identification concept is an extension of the OPC UA BrowseName Identification (valid in the namespace of the OPC UA Server).

Table 15 defines the AASReferable ObjectType.

Table 15 – IAASReferableType Definition

Attribute

Value

BrowseName

IAASReferableType

IsAbstract

False

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

Subtype of the BaseInterfaceType defined in OPC 10000-5, i.e. inheriting the InstanceDeclarations of that Node.

0:HasProperty

Variable

Category

0:String

0:PropertyType

M

0:HasDictionaryEntry

Object

Admin-shell.io/aas/2/0/Referable

AASIriConceptDescriptionType

The OPC UA node attribute “description” is used for the IAASReferableType instances.

The components of the IAASReferableType have additional references which are defined in Table 16.

Table 16 – IAASReferableType Additional References

Source Path

Reference Type

Is Forward

Target Path

Category

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/Referable/category

Table 17 defines the IAASIdentifiable ObjectType.

Table 17 – IAASIdentifiableType Definition

Attribute

Value

BrowseName

IAASIdentifiableType

IsAbstract

False

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

Subtype of the IAASReferableType defined in OPC 10000-19, i.e. inheriting the InstanceDeclarations of that Node.

0:HasComponent

Object

Identification

AASIdentifierType

M

0:HasComponent

Object

Administration

AASAdministrativeInformationType

M

0:HasDictionaryEntry

Object

Admin-shell.io/aas/2/0/Identifiable

AASIriConceptDescriptionType

The components of the IAASReferableType have additional references which are defined in Table 18.

Table 18 – IAASIdentifiableType Additional References

Source Path

Reference Type

Is Forward

Target Path

Identification

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/Identifiable/identification

Administration

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/Identifiable/administration

The AdministrativeInformationType is a subtype of the BaseObjectType. Table 19 defines the AASAdministrationInformation ObjectType.

Table 19 – AASAdministrativeInformationType Definition

Attribute

Value

BrowseName

AASAdministrativeInformationType

IsAbstract

False

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

Subtype of the BaseObjectType defined in OPC 10000-5, i.e. inheriting the InstanceDeclarations of that Node.

0:HasProperty

Variable

Version

0:String

0:PropertyType

O

0:HasProperty

Variable

Revision

0:String

0:PropertyType

O

0:HasDictionaryEntry

Object

Admin-shell.io/aas/2/0/AdministrativeInformation

AASIriConceptDescriptionType

The components of the AASAdministrativeInformationType have additional references which are defined in Table 20.

Table 20 – AASAdministrativeInformationType Additional References

Source Path

Reference Type

Is Forward

Target Path

Version

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/AdministrativeInformation/version

Revision

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/AdministrativeInformation/revision

Table 21 defines the AASIdentifier ObjectType. It is used to uniquely identify an entity.

Table 21 – AASIdentifierType

Attribute

Value

BrowseName

AASIdentifierType

IsAbstract

False

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

Subtype of the BaseObjectType defined in OPC 10000-5

0:HasProperty

Variable

Id

String

0:PropertyType

M

0:HasProperty

Variable

IdType

AASIdentifierTypeDataType

0:PropertyType

M

0:HasDictionaryEntry

Object

Admin-shell.io/aas/2/0/Identifier

AASIriConceptDescriptionType

The components of the AASIdentifierType have additional references which are defined in Table 22.

Table 22 – AASIdentifierType Additional References

Source Path

Reference Type

Is Forward

Target Path

Id

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/Identifier/id

IdType

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/Identifier/idType

Figure 12 shows an overview about the AASAsset ObjectType.

image017.png

Figure 12 – AASAssetType graphical overview

The Asset Type describes meta data of an asset that is represented by an AAS. The asset has a globally unique identifier (I4AASIdentifiableType) plus – if needed – additional domain specific (proprietary) identifiers (Table 23). Optionally it can refer to a list of submodels.

Table 23 – AASAssetType Definition

Attribute

Value

BrowseName

AASAssetType

IsAbstract

False

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

Subtype of the BaseObjectType defined in OPC 10000-5, i.e. inheriting the InstanceDeclarations of that Node.

0:HasInterface

ObjectType

IAASIdentifiableType

-

-

-

0:HasComponent

Object

<DataSpecification>

AASReferenceType

OP

0:HasProperty

Variable

AssetKind

AASAssetKindDataType

0:PropertyType

M

0:HasComponent

Object

AssetIdentificationModel

-

AASReferenceType

O

0:HasComponent

Object

BillOfMaterial

-

AASReferenceType

O

0:HasDictionaryEntry

Object

Admin-shell.io/aas/2/0/Asset

AASIriConceptDescriptionType

The components of the AASAssetType have additional references which are defined in Table 24.

Table 24 – AASAssetType Additional References

Source Path

Reference Type

Is Forward

Target Path

<DataSpecification>

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/Asset/dataSpecifications

AssetKind

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/Asset/assetKind

AssetIdentificationModel

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/Asset/assetIdentificationModel

BillOfMaterial

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/Asset/billOfMaterial

Figure 13 shows an overview about the AASSubmodel ObjectType.

image018.png

Figure 13 – AASSubmodelType graphical overview

A Submodel defines a specific aspect of the asset represented by the AAS and is defined in Table 25.

A submodel is used to structure the information model of an AAS representing the technical functionality of the underlying asset into distinguishable parts. Each submodel refers to a well-defined domain or subject matter. Submodels can become standardized and thus become submodel templates. Submodels can have different life-cycles.

Note: The concept of template and instance applies to properties.

Table 25 – AASSubmodelType Definition

Attribute

Value

BrowseName

AASSubmodelType

IsAbstract

False

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

Subtype of the BaseObjectType defined in OPC 10000-5, i.e. inheriting the InstanceDeclarations of that Node.

0:HasInterface

ObjectType

IAASIdentifiableType

-

-

-

0:HasComponent

Object

<DataSpecification>

AASReferenceType

OP

0:HasProperty

Variable

ModelingKind

AASModelingKindDataType

0:PropertyType

M

0:HasComponent

Object

<Qualifier>

AASQualifierType

OP

0:HasComponent

Object

<SubmodelElement>

AASSubmodelElementType

OP

0:HasDictionaryEntry

Object

Admin-shell.io/aas/2/0/Submodel

AASIriConceptDescriptionType

The default value of the variable “ModelingKind” is “Instance”.

For each AASSubmodelType instance the semanticId is mapped to the OPC UA HasDictionaryEntry reference. This is why the semanticId refers to the instance of the submodel element. This is equivalent to the DictionaryEntry which refers to the concept dictionary element which describes the individual instance not the submodel type.

The components of the AASSubmodelType have additional references which are defined in Table 26.

Table 26 – AASSubmodelType Additional References

Source Path

Reference Type

Is Forward

Target Path

<DataSpecification>

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/Asset/dataSpecifications

ModelingKind

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/HasKind/kind

<Qualifier>

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/Submodel/qualifiers

<SubmodelElement>

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/Submodel/submodelElements

To meet the range of aspects of the assets which have to be described in the AAS a set of submodel element types are defined. Each submodel element type represents one of these aspects. Figure 14 provides a general overview.

image019.png

Figure 14 – SubmodelElement Subtypes

Figure 15 shows an overview about the AASSubmodelElement ObjectType.

image020.png

Figure 15 – AASSubmodelElementType graphical overview

A data element is a submodel element that is not further composed of other submodel elements (Table 27). A data element is a submodel element that has a value. The type of value may differ for different data elements.

Table 27 – AASSubmodelElementType Definition

Attribute

Value

BrowseName

AASSubmodelElementType

IsAbstract

True

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

Subtype of the BaseObjectType defined in OPC 10000-5, i.e. inheriting the InstanceDeclarations of that Node.

0:HasInterface

ObjectType

IAASReferableType

-

-

0:HasProperty

Variable

ModelingKind

AASModelingKindDataType

0:PropertyType

M

0:HasComponent

Object

<Qualifier>

AASQualifierType

OP

0:HasComponent

Object

<DataSpecification>

AASReferenceType

OP

0:HasDictionaryEntry

Object

<IRDI_or_IRI_or_Custom_concept_description_entry>

AASIriConceptDescriptionType

0:HasDictionaryEntry

Object

Admin-shell.io/aas/2/0/SubmodelElement

AASIriConceptDescriptionType

Applied from IAASReferableType

0:HasProperty

Variable

Category

0:String

0:PropertyType

M

The default value of the variable “ModelingKind” is “Instance”.

For each AASSubmodelElementType instance the semanticId is mapped to the OPC UA HasDictionaryEntry. This is at instance level because the DictionaryEntry refers to the concept dictionary element, which describes the individual instance and not the submodel element type.

The components of the AASSubmodelElementType have additional references which are defined in Table 28.

Table 28 – AASSubmodelElementType Additional References

Source Path

Reference Type

Is Forward

Target Path

<DataSpecification>

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/hasDataSpecification/dataSpecification

ModelingKind

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/SubmodelElement/kind

<Qualifier>

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/SubmodelElement/qualifiers

Figure 16 shows an overview about the AASSubmodelElementCollection ObjectType.

image021.png

Figure 16 – AASSubmodelElementCollectionType graphical overview

A submodel element collection is a set or list of submodel elements. The AASSubmodelElementCollectionType is defined in Table 29

Table 29 – AASSubmodelElementCollectionType Definition

Attribute

Value

BrowseName

AASSubmodelElementCollectionType

IsAbstract

False

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

Subtype of the AASSubmodelElementType defined 6.8.1, i.e. inheriting the InstanceDeclarations of that Node.

0:HasComponent

Object

<SubmodelElement>

AASSubmodelElementType

OP

0:HasProperty

Variable

AllowDuplicates

0:Boolean

0:PropertyType

O

0:HasDictionaryEntry

Object

Admin-shell.io/aas/2/0/SubmodelElementCollection

AASIriConceptDescriptionType

The components of the AASSubmodelElementCollectionType have additional references which are defined in Table 30.

Table 30 – AASSubmodelElementCollectionType Additional References

Source Path

Reference Type

Is Forward

Target Path

<SubmodelElement>

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/SubmodelElementCollection/values

AllowDuplicates

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/SubmodelElementCollection/allowDuplicates

The value elements in this collection are not ordered (i.e. http://Admin-shell.io/aas/2/0/ SubmodelElementCollection/ordered == False).

Figure 17 shows an overview about the AASOrderedSubmodelElementCollection ObjectType.

image022.png

Figure 17 – AASOrderedSubmodelElementCollectionType graphical overview

Table 31 defines the AASOrderedSubmodelElementCollection ObjectType.

Table 31 – AASOrderedSubmodelElementCollectionType Definition

Attribute

Value

BrowseName

AASOrderedSubmodelElementCollectionType

IsAbstract

False

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

Subtype of the AASSubmodelElementCollectionType defined in Table 29 and Table 30 i.e. inheriting the InstanceDeclarations of that Node.

0:HasOrderedComponent

Object

<SubmodelElement>

AASSubmodelElementType

OP

0:HasDictionaryEntry

Object

Admin-shell.io/aas/2/0/SubmodelElementCollection

AASIriConceptDescriptionType

The components of the AASOrderedSubmodelElementCollectionType have additional references which are defined in Table 32.

Table 32 – AASOrderedSubmodelElementCollectionType Additional References

Source Path

Reference Type

Is Forward

Target Path

<SubmodelElement>

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/SubmodelElementCollection/values

The value elements in this collection are ordered (i.e. http://Admin-shell.io/aas/2/0/ SubmodelElementCollection/ordered == True).

Figure 18 shows an overview about the AASMultiLanguageProperty ObjectType

image023.png

Figure 18 – AASMultiLanguagePropertyType graphical overview

This submodel element type is used for properties with a value that can be provided in multiple languages (see Table 33).

Table 33 – AASMultiLanguagePropertyType Definition

Attribute

Value

BrowseName

AASMultiLanguagePropertyType

IsAbstract

False

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

Subtype of the AASSubmodelElementType defined 6.8.1, i.e. inheriting the InstanceDeclarations of that Node

0:HasComponent

Object

ValueId

AASReferenceType

O

0:HasProperty

Variable

Value

0:LocalizedText[]

0:PropertyType

O

0:HasDictionaryEntry

Object

Admin-shell.io/aas/2/0/MultiLanguageProperty

AASIriConceptDescriptionType

The components of the AASMultiLanguagePropertyType have additional references which are defined in Table 34.

Table 34 – AASMultiLanguagePropertyType Additional References

Source Path

Reference Type

Is Forward

Target Path

ValueId

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/MultiLanguageProperty/valueId

Value

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/MultiLanguageProperty/value

Figure 19 shows an overview about the AASProperty ObjectType.

image024.png

Figure 19 – AASPropertyType graphical overview

The valueId attribute references a DictionaryEntry. Table 35 defines the AASProperty ObjectType.

Table 35 – AASPropertyType Definition

Attribute

Value

BrowseName

AASPropertyType

IsAbstract

False

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

Subtype of the AASSubmodelElementType defined 6.8.1, i.e. inheriting the InstanceDeclarations of that Node.

0:HasProperty

Variable

Value

0:BaseDataType

0:PropertyType

O

0:HasProperty

Variable

ValueType

AASValueTypeDataType

0:PropertyType

M

0:HasComponent

Object

ValueId

-

AASReferenceType

O

0:HasDictionaryEntry

Object

Admin-shell.io/aas/2/0/Property

AASIriConceptDescriptionType

The components of the AASPropertyType have additional references which are defined in Table 36.

Table 36 – AASPropertyType Additional References

Source Path

Reference Type

Is Forward

Target Path

Value

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/Property/value

ValueType

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/Property/valueType

ValueId

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/Property/valueId

Table 37 defines the AASCapability ObjectType.

Table 37 – AASCapabilityType Definition

Attribute

Value

BrowseName

AASCapabilityType

IsAbstract

False

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

Subtype of the AASSubmodelElementType defined 6.8.1, i.e. inheriting the InstanceDeclarations of that Node.

0:HasDictionaryEntry

Object

Admin-shell.io/aas/2/0/Property

AASIriConceptDescriptionType

Figure 20 shows an overview about the AASOperation ObjectType.

image025.png

Figure 20 – AASOperationType graphical overview

AASOperationType is defined in Table 38. It encapsulates the standard OPC UA Method “Operation”. All rules for the OPC UA Method NodeClass declaration apply. “Operation” is defined without Arguments but with the OptionalPlaceholder ModellingRule. As defined in OPC 10000-3, this rule allows the inclusion of Arguments to this Method on sub-types or on instances.

Table 38 – AASOperationType Definition

Attribute

Value

BrowseName

AASOperationType

IsAbstract

False

References

NodeClass

BrowseName

Data

Type

TypeDefinition

Others

Subtype of the AASSubmodelElementType defined 6.8.1, i.e. inheriting the InstanceDeclarations of that Node.

0:HasComponent

Method

Operation

MP

0:HasDictionaryEntry

Object

Admin-shell.io/aas/2/0/Operation

AASIriConceptDescriptionType

An example of a method definition is:

Signature

Method_xy_name (

[InputArgument]

0:PropertyType BrowseNameA

0:PropertyType BrowseNameB

[OutputArgument]

0:PropertyType BrowseNameK

0:PropertyType BrowseNameL

)

Each individual element of the InputArgument and OutputArgument has to be referenced by a 0:HasDictionaryEntry to its semantic definition.

Figure 21 shows an overview about the AASBlob ObjectType.

image026.png

Figure 21 – AASBlobType graphical overview

Table 39 defines the AASBlob ObjectType.

Table 39 – AASBlobType Definition

Attribute

Value

BrowseName

AASBlobType

IsAbstract

False

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

Subtype of the AASSubmodelElementType defined 6.8.1, i.e. inheriting the InstanceDeclarations of that Node.

0:HasComponent

Object

File

0:FileType

M

0:HasDictionaryEntry

Object

Admin-shell.io/aas/2/0/Blob

AASIriConceptDescriptionType

The components of the AASBlobType have additional references which are defined in Table 40.

Table 40 – AASBlobType Additional References

Source Path

Reference Type

Is Forward

Target Path

File

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/Blob/value

Figure 22 shows an overview about the AASFile ObjectType.

image027.png

Figure 22 – AASFileType graphical overview

Table 41 defines the AASFile ObjectType.

Table 41 – AASFileType Definition

Attribute

Value

BrowseName

AASFileType

IsAbstract

False

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

Subtype of the AASSubmodelElementType defined 6.8.1, i.e. inheriting the InstanceDeclarations of that Node.

0:HasProperty

Variable

Value

0:String

0:PropertyType

M

0:HasProperty

Variable

MimeType

AASMimeDataType

0:PropertyType

M

0:HasComponent

Object

File

0:FileType

O

0:HasDictionaryEntry

Object

Admin-shell.io/aas/2/0/File

AASIriConceptDescriptionType

The components of the AASFileType have additional references which are defined in Table 42.

Table 42 – AASFileType Additional References

Source Path

Reference Type

Is Forward

Target Path

File

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/File/value

MimeType

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/File/mimeType

The additional reference to the real file of type 0:FileType is optional and not specified as such in the asset administration shell metamodel.

Figure 23 shows an overview about the AASRelationElement ObjectType.

image028.png

Figure 23 – AASRelationElementType graphical overview

A relationship element is used to define a relationship between two referable elements (Table 43).

Table 43 – AASRelationshipElementType Definition

Attribute

Value

BrowseName

AASRelationshipElementType

IsAbstract

False

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

Subtype of the AASSubmodelElementType defined 6.8.1, i.e. inheriting the InstanceDeclarations of that Node.

0:HasComponent

Object

First

AASReferenceType

M

0:HasComponent

Object

Second

AASReferenceType

M

0:HasDictionaryEntry

Object

Admin-shell.io/aas/2/0/RelationshipElement

AASIriConceptDescriptionType

Objects which have the AASReferenceType shall reference another type. According to Table 43 these are the following references:

  • the “First” node shall reference the Referable Type instance having the role of the subject
  • the “Second” node shall reference the Referable Type instance having the role of the object

The components of the AASRelationshipType have additional references defined in Table 44.

Table 44 – AASRelationshipElementType Additional References

Source Path

Reference Type

Is Forward

Target Path

First

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/RelationshipElement/first

Second

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/RelationshipElement/second

Table 45 defines the AASAnnotatedRelationshipElement ObjectType.

Table 45 – AASAnnotatedRelationshipElementType Definition

Attribute

Value

BrowseName

AASAnnotatedRelationshipElementType

IsAbstract

False

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

Subtype of the AASRelationshipElementType defined in Table 45, i.e. inheriting the InstanceDeclarations of that Node.

0:HasComponent

Object

<DataElement>

AASSubmodelElementType

OP

0:HasDictionaryEntry

Object

Admin-shell.io/aas/2/0/AnnotatedRelationshipElement

AASIriConceptDescriptionType

The components of the AASAnnotatedRelationshipElementType have additional references which are defined in Table 46.

Table 46 – AASAnnotatedRelationshipElementType Additional References

Source Path

Reference Type

Is Forward

Target Path

<DataElement>

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/AnnotatedRelationshipElement/annotations

The following SubmodelElement objects are allowed for AASAnnotatedRelationshipElementType:

  • AASProperty
  • AASMultiLanguageProperty
  • AASRangeType
  • AASReferenceElementType
  • AASFileType
  • AASBlobType

Figure 24 shows an overview about the AASReferenceElement ObjectType.

image029.png

image030.png

Figure 24 – AASReferenceElementType graphical overview

An AASReferenceElement has a Reference as value (Table 47). This reference has an aggregation of keys (see Table 47) which represents a key chain. The resolved key chain points to an element.

Table 47 – AASReferenceElementType Definition

Attribute

Value

BrowseName

AASReferenceElementType

IsAbstract

False

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

Subtype of the AASSubmodelElementType defined 6.8.1, i.e. inheriting the InstanceDeclarations of that Node.

0:HasComponent

Object

Value

AASReferenceType

M

0:HasDictionaryEntry

Object

Admin-shell.io/aas/2/0/ReferenceElement

AASIriConceptDescriptionType

The Object which has the AASReferenceType shall reference another type. According to Table 47 the “Value” can contain the allowed subtypes of AASSubmodelElementTypes as defined in chapter 6.3.

The components of the AASReferenceElementType have additional references which are defined in Table 48.

Table 48 – AASReferenceElementType Additional References

Source Path

Reference Type

Is Forward

Target Path

Value

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/ReferenceElement/value

Figure 25 shows an overview about the AASEvent ObjectType.

image031.png

Figure 25 – AASEventType graphical overview

Table 49 defines the AASEvent ObjectType.

Table 49 – AASEventType Definition

Attribute

Value

BrowseName

AASEventType

IsAbstract

False

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

Subtype of the AASSubmodelElementType defined 6.8.1, i.e. inheriting the InstanceDeclarations of that Node.

The attribute “observed” of the BasicEvent submodel element in the AAS metamodel is mapped to the OPC UA eventing mechanism using GeneratesEvent-references pointing from instances of this AASEventType to ObjectTypeNodes of type BaseEventType or its customized subclasses.

Figure 26 shows an overview about the AASEntity ObjectType.

image032.png

Figure 26 – AASEntityType graphical overview

Table 50 defines the AASEntity ObjectType.

Table 50 – AASEntityType Definition

Attribute

Value

BrowseName

AASEntityType

IsAbstract

False

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

Subtype of the AASSubmodelElementType defined 6.8.1, i.e. inheriting the InstanceDeclarations of that Node.

0:HasComponent

Object

<SubmodelElement>

-

AASSubmodelElementType

OP

0:HasProperty

Variable

EntityType

AASEntityTypeDataType

0:PropertyType

M

0:HasComponent

Object

Asset

-

AASReferenceType

O

0:HasDictionaryEntry

Object

Admin-shell.io/aas/2/0/Entity

AASIriConceptDescriptionType

The components of the AASEntityType have additional references which are defined in Table 51.

Table 51 – AASEntityType Additional References

Source Path

Reference Type

Is Forward

Target Path

<SubmodelElement>

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/Entity/statements

EntityType

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/Entity/entityType

Asset

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/Entity/asset

If Min missing then negative open range infinitely, if max missing the open range infinitely.

Table 52 – AASRangeType Definition

Attribute

Value

BrowseName

AASRangeType

IsAbstract

False

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

Subtype of the AASSubmodelElementType defined 6.8.1, i.e. inheriting the InstanceDeclarations of that Node.

0:HasProperty

Variable

ValueType

AASValueTypeDataType

0:PropertyType

M

0:HasProperty

Variable

Min

0:BaseDataType

0:PropertyType

O

0:HasProperty

Variable

Max

0:BaseDataType

0:PropertyType

O

0:HasDictionaryEntry

Object

Admin-shell.io/aas/2/0/Range

AASIriConceptDescriptionType

Only simple data type of the OPC UA specification are allowed.

The components of the AASRangeType have additional references which are defined in Table 53.

Table 53 – AASRangeType Additional References

Source Path

Reference Type

Is Forward

Target Path

ValueType

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/Range/valueType

Min

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/Range/min

Max

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/Range/max

The AAS can define its own dictionary that contains semantic definitions of its submodel elements. These semantic definitions are called concept descriptions (ConceptDescription). It is optional whether an AAS defines its own concept dictionary (ConceptDescription) or not.

A concept description is inheriting from the predefined OPC UA IrdiDictionaryEntry or UriDictionaryEntry ( Figure 27). This is why there are both ObjectTypes: “AASIrdiConceptDescriptionType” or “AASIriConceptDescriptionType” and not only one like for the other AAS classes. Additionally, for user specific dictionaries the “AASCustomConceptDescriptionType” is derived from the general OPC UA DictionaryEntryType. The semanticId is modelled by using the predefined OPC UA ReferenceType HasDictionaryEntry and is either referencing an object of type “AASIrdiConceptDescriptionType” and of type “AASUriConceptDescriptionType” or “AASCustomConceptDescriptionType”. Additionally, a concept description has at least one Add-In to allow the usage of the IEC61360 data specification template (see rules for data specifications in section 5.1 and section 6.10).

The ConceptDescription types are located under the standard OPC UA folder Dictionaries.

image033.png

Figure 27 – Concept description and data specification OPC UA graphical model

Table 54 defines the AASIrdiConceptDescription ObjectType.

Table 54 – AASIrdiConceptDescriptionType Definition

Attribute

Value

BrowseName

AASIrdiConceptDescriptionType

IsAbstract

False

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

Subtype of the IrdiDictionaryEntryType defined in OPC 10000-19, i.e. inheriting the InstanceDeclarations of that Node.

0:HasComponent

Object

<DataSpecification>

AASReferenceType

OP

0:HasInterface

ObjectType

IAASIdentifiableType

-

-

-

0:HasComponent

Object

<ConceptDescription>

AASReferenceType

OP

0:HasDictionaryEntry

Object

Admin-shell.io/aas/2/0/ConceptDescription

AASIriConceptDescriptionType

The components of the AASIrdiConceptDescriptionType have additional references which are defined in Table 55.

Table 55 – AASIrdiConceptDescriptionType Additional References

Source Path

Reference Type

Is Forward

Target Path

<DataSpecification>

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/hasDataSpecification/dataSpecification

<ConceptDescription>

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/ConceptDescription/IsCaseOf

Table 56 defines the AASIriConceptDescription ObjectType.

Table 56 – AASIriConceptDescriptionType Definition

Attribute

Value

BrowseName

AASIriConceptDescriptionType

IsAbstract

False

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

Subtype of the UriDictionaryEntryType defined in OPC 10000-19, i.e. inheriting the InstanceDeclarations of that Node.

0:HasComponent

Object

<DataSpecification>

AASReferenceType

OP

0:HasInterface

ObjectType

IAASIdentifiableType

-

-

-

0:HasComponent

Object

<ConceptDescription>

AASReferenceType

OP

0:HasDictionaryEntry

Object

Admin-shell.io/aas/2/0/ConceptDescription

AASIriConceptDescriptionType

The components of the AASIriConceptDescriptionType have additional references which are defined in Table 57.

Table 57 – AASIriConceptDescriptionType Additional References

Source Path

Reference Type

Is Forward

Target Path

<DataSpecification>

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/hasDataSpecification/dataSpecification

<ConceptDescription>

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/ConceptDescription/IsCaseOf

Table 58 defines the AASCustomConceptDescription ObjectType.

Table 58 – AASCustomConceptDescriptionType Definition

Attribute

Value

BrowseName

AASCustomConceptDescriptionType

IsAbstract

False

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

Subtype of the DictionaryEntryType defined in OPC 10000-19, i.e. inheriting the InstanceDeclarations of that Node.

0:HasComponent

Object

<DataSpecification>

AASReferenceType

OP

0:HasInterface

ObjectType

IAASIdentifiableType

-

-

-

0:HasComponent

Object

<ConceptDescription>

AASReferenceType

OP

0:HasDictionaryEntry

Object

Admin-shell.io/aas/2/0/ConceptDescription

AASIriConceptDescriptionType

The components of the AASCustomConceptDescriptionType have additional references which are defined in Table 59.

Table 59 – AASCustomConceptDescriptionType Additional References

Source Path

Reference Type

Is Forward

Target Path

<DataSpecification>

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/hasDataSpecification/dataSpecification

<ConceptDescription>

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/ConceptDescription/IsCaseOf

Concrete data specifications are inheriting from the AAS ObjectType “AASDataSpecificationType”. The AAS attributes of DataSpecification are modelled as properties of the AASDataSpecificationType but are not instantiated. This is always the case in OPC UA if there are no modelling rules attached to a property (Table 60).

The concept of embedded data specifications is used. The element that is using the data specification uses the OPC ReferenceType “HasComponent”. This Add-In uses pairs of elements: one property being the global external reference to a data specification, the other one the data specification.

Table 60 – AASDataSpecificationType Definition

Attribute

Value

BrowseName

AASDataSpecificationType

IsAbstract

True

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

Subtype of the BaseObjectType defined in OPC 10000-5, i.e. inheriting the InstanceDeclarations of that Node.

0:HasInterface

ObjectType

IAASIdentifiableType

-

-

-

0:HasDictionaryEntry

Object

Admin-shell.io/aas/2/0/DataSpecification

AASIriConceptDescriptionType

Figure 28 shows an overview about the AASDataSpecificationIEC61360 ObjectType.

image034.png

Figure 28 – AASDataSpecificationIEC61360Type graphical overview

Table 61 defines the AASDataSpecificationIEC61360 ObjectType.

Table 61 – AASDataSpecificationIEC61360Type Definition

Attribute

Value

BrowseName

AASDataSpecificationIEC61360Type

IsAbstract

False

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

Subtype of the AASDataSpecificationType defined in Table 60, i.e. inheriting the InstanceDeclarations of that Node.

0:HasProperty

Variable

0:DefaultInstanceBrowseName

String

0:PropertyType

M

0:HasProperty

Variable

Category

AASCategoryDataType

0:PropertyType

O

0:HasComponent

Object

Identification

AASIdentifierType

M

0:HasComponent

Object

Administration

AASAdministrativeInformationType

M

0:HasProperty

Variable

DataType

AASDataTypeIEC61360DataType

0:PropertyType

O

0:HasProperty

Variable

Definition

0:LocalizedText

0:PropertyType

O

0:HasProperty

Variable

PreferredName

0:LocalizedText

0:PropertyType

M

0:HasProperty

Variable

ShortName

0:LocalizedText

0:PropertyType

O

0:HasProperty

Variable

SourceOfDefinition

0:String

0:PropertyType

O

0:HasProperty

Variable

Symbol

0:String

0:PropertyType

O

0:HasProperty

Variable

Unit

0:String

0:PropertyType

O

0:HasComponent

Object

UnitId

AASReferenceType

O

0:HasProperty

Variable

ValueFormat

0:String

0:PropertyType

O

0:HasComponent

Object

ValueList

ValueListType

O

0:HasProperty

Variable

Value

0:BaseDataType

0:PropertyType

O

0:HasComponent

Object

ValueId

-

AASReferenceType

O

0:HasProperty

Variable

LevelType

AASLevelTypeDataType

O

0:HasDictionaryEntry

Object

Admin-shell.io/DataSpecificationTemplates/DataSpecificationIEC61360/2/0

AASIriConceptDescriptionType

The components of the AASDataSpecificationType have additional references which are defined in Table 62.

Table 62 – AASDataSpecificationIEC61360Type Additional References

Source Path

Reference Type

Is Forward

Target Path

Category

0:HasDictionaryEntry

True

Admin-shell.io/DataSpecification/category

Identification

0:HasDictionaryEntry

True

Admin-shell.io/DataSpecification/identification

Administration

0:HasDictionaryEntry

True

Admin-shell.io/DataSpecification/administration

DataType

0:HasDictionaryEntry

True

Admin-shell.io/DataSpecificationTemplates/DataSpecificationIEC61360/2/0//DataSpecificationIEC61360/dataType

Definition

0:HasDictionaryEntry

True

Admin-shell.io/DataSpecificationTemplates/DataSpecificationIEC61360/2/0//DataSpecificationIEC61360/definition

PreferredName

0:HasDictionaryEntry

True

Admin-shell.io/DataSpecificationTemplates/DataSpecificationIEC61360/2/0//DataSpecificationIEC61360/preferredName

ShortName

0:HasDictionaryEntry

True

Admin-shell.io/DataSpecificationTemplates/DataSpecificationIEC61360/2/0//DataSpecificationIEC61360/shortName

SourceOfDefinition

0:HasDictionaryEntry

True

Admin-shell.io/DataSpecificationTemplates/DataSpecificationIEC61360/2/0//DataSpecificationIEC61360/sourceOfDefinition

Symbol

0:HasDictionaryEntry

True

Admin-shell.io/DataSpecificationTemplates/DataSpecificationIEC61360/2/0//DataSpecificationIEC61360/symbol

Unit

0:HasDictionaryEntry

True

Admin-shell.io/DataSpecificationTemplates/DataSpecificationIEC61360/2/0//DataSpecificationIEC61360/unit

UnitId

0:HasDictionaryEntry

True

Admin-shell.io/DataSpecificationTemplates/DataSpecificationIEC61360/2/0//DataSpecificationIEC61360/unitId

ValueFormat

0:HasDictionaryEntry

True

Admin-shell.io/DataSpecificationTemplates/DataSpecificationIEC61360/2/0//DataSpecificationIEC61360/valueFormat

ValueList

0:HasDictionaryEntry

True

Admin-shell.io/DataSpecificationTemplates/DataSpecificationIEC61360/2/0/valueList

Value

0:HasDictionaryEntry

True

Admin-shell.io/DataSpecificationTemplates/DataSpecificationIEC61360/2/0//DataSpecificationIEC61360/value

ValueId

0:HasDictionaryEntry

True

Admin-shell.io/DataSpecificationTemplates/DataSpecificationIEC61360/2/0//DataSpecificationIEC61360/valueId

LevelType

0:HasDictionaryEntry

True

Admin-shell.io/DataSpecificationTemplates/DataSpecificationIEC61360/2/0//DataSpecificationIEC61360/levelType

Figure 29 shows an overview about the AASQualifier ObjectType.

image035.png

Figure 29 – Structure of the object AASQualifierType

Table 63 defines the AASQualifier ObjectType.

Table 63 – AASQualifierType Definition

Attribute

Value

BrowseName

AASQualifierType

IsAbstract

False

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

Subtype of the BaseObjectType defined in OPC 10000-5

0:HasProperty

Variable

Type

0:String

0:PropertyType

M

0:HasProperty

Variable

ValueType

AASValueTypeDataType

0:PropertyType

M

0:HasProperty

Variable

Value

0:BaseDataType

0:PropertyType

O

0:HasComponent

Object

ValueId

AASReferenceType

O

0:HasDictionaryEntry

Object

Admin-shell.io/aas/2/0/Qualifier

AASIriConceptDescriptionType

*Note: Constraint AASd-006: if both, the value and the valueId are present then the value needs to be identical to the value of the referenced

coded value in Qualifier/valueId.

The components of the AASQualifierType have additional references which are defined in Table 64.

Table 64 – AASQualifierType Additional References

Source Path

Reference Type

Is Forward

Target Path

Type

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/Qualifier/type

ValueType

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/Qualifier/valueType

Value

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/Qualifier/value

The HasDictionaryEntity of Table 63 is denoted by the complete qualifier. The ValueId of Table 63 is referencing the individual value instantiated in the Value of the AASQualifier instance. There are multiple qualifier value depending on the application domain and the application case. While the semanticId of the qualifier is fixed the semanticId of the ValueId is instance dependent. A JSON example is shown below. The “semanticId” references the AASQualifier instance itself. The "DinSpec29000QualifierType" ValueId Keys value references the “required” value semantic coming from the DIN-SEC 29000.

Note: the IRI for defining the unique semantic ids of the qualifier and its values are only examples.

"qualifiers": [

{

"semanticId": {

"keys": [

{

"type": "GlobalReference",

"local": false,

"value": "http://DINSPEC/29000/PropertyValueStatement/ExpressionSemantic",

"index": 0,

"idType": "IRI"

}

]

},

"type": "ExpressionSemantic",

"value": "REQUIREMENT_0",

"valueId": {

"keys": [

{

"type": "GlobalReference",

"local": false,

"value": " http://DINSPEC/29000/PropertyValueStatement/ExpressionSemantic/Requirement",

"index": 0,

"idType": "IRI"

}

]

},

Table 65 defines the AASView ObjectType.

Table 65 – AASViewType Definition

Attribute

Value

BrowseName

AASViewType

IsAbstract

False

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

Subtype of the FolderType defined in OPC 10000-5, i.e. inheriting the InstanceDeclarations of that Node.

0:HasComponent

Object

<Referable>

AASReferenceType

OP

0:HasComponent

Object

<DataSpecification>

AASReferenceType

OP

0:HasDictionaryEntry

Object

Admin-shell.io/aas/2/0/View

AASIriConceptDescriptionType

For each AASViewType instance the semanticId is mapped to the OPC UA DictionaryEntryType. This is at instance level because the DictionaryEntry refers to the concept dictionary element which describes the individual instance not the AASView type.

The components of the AASViewType have additional references which are defined in Table 66.

Table 66 – AASViewType Additional References

SourceBrowsePath

Reference Type

Is Forward

Target Path

<Referable>

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/View/containedElements

<DataSpecification>

0:HasDictionaryEntry

True

Admin-shell.io/aas/2/0/View/dataSpecifications