Overview of Submodel Element Types

An annotated relationship element is a relationship element that can be annotated with additional data elements.

A data element that represents an annotation that holds for the relationship between the two elements

A basic event element

Reference to a referable, e.g. a data element or a submodel that is being observed

Direction of event

Can be \{ input, output }

State of event

Can be { on, off }

Information for the outer message infrastructure to schedule the event for the respective communication channel.

Information about which outer message infrastructure shall handle messages for the EventElement; refers to a Submodel, SubmodelElementList, SubmodelElementCollection or Entity, which contains DataElements describing the proprietary specification for the message broker

Timestamp in UTC, when the last event was received (input direction) or sent (output direction)

For input direction reports on the maximum frequency, the software entity behind the respective referable can handle input events.

For output events, the maximum frequency of outputting this event to an outer infrastructure is specified.

Might be not specified, i.e. if there is no minimum interval.

Not applicable for input direction

For output direction: maximum interval in time, the respective referable shall send an update of the status of the event, even if no other trigger condition for the event was not met.

Might not be specified, i.e. if there is no maximum interval.

Direction

Input direction

Output direction

State of an event

Event is on

Event is off

Defines the necessary information of an event instance sent out or received

Reference to the source event element

semanticId of the source event element, if available

Reference to the referable, which defines the scope of the event.

semanticId of the referable, which defines the scope of the event, if available.

Information for the outer message infrastructure to schedule the event for the respective communication channel

Subject, who/which initiated the creation

Timestamp in UTC, when this event was triggered

Event-specific payload

A Blob is a data element representing a file that is contained in the value attribute with its source code.

The value of the blob instance of a blob data element

Content type of the content of the blob.

The content type (MIME type) states which file extensions the file can have.

Valid values are content types like "application/json", "application/xls", "image/jpg".

The allowed values are defined as in RFC2046.

A capability is the implementation-independent description of the potential of an asset to achieve a certain effect in the physical or virtual world.

A data element is a submodel element that is not further composed of other submodel elements.

A data element is a submodel element that has a value. The type of value differs for different subtypes of data elements.

Constraint AASd-090: For data elements, category (inherited by Referable) shall be one of the following values: CONSTANT, PARAMETER or VARIABLE. Default: VARIABLE

An entity is a submodel element that is used to model entities.

Constraint AASd-014: Either the attribute globalAssetId or specificAssetId of an Entity must be set if Entity/entityType is set to "SelfManagedEntity".

Describes statements applicable to the entity by a set of submodel elements, typically with a qualified value

Describes whether the entity is a co-managed entity or a self-managed entity

Global identifier of the asset the entity is representing

Reference to a specific asset ID representing a supplementary identifier of the asset represented by the Asset Administration Shell

Enumeration for denoting whether an entity is a self-managed entity or a co-managed entity

There is no separate Asset Administration Shell for co-managed entities. Co-managed entities need to be part of a self-managed entity.

Self-managed entities have their own Asset Administration Shell but can be part of another composite self-managed entity.

The asset represented by an Asset Administration Shell is a self-managed entity per definition.

An event element

A file is a data element that represents an address to a file (a locator). The value is a URI that can represent an absolute or relative path.

Path and name of the file (with file extension)

The path can be absolute or relative.

Content type of the content of the file

A property is a data element that has a multi-language value.

Constraint AASd-012: If both the MultiLanguageProperty/value and the MultiLanguageProperty/valueId are present, the meaning must be the same for each string in a specific language, as specified in MultiLanguageProperty/valueId.

The value of the property instance

Reference to the global unique ID of a coded value.

An operation is a submodel element with input and output variables.

Constraint AASd-134: For an Operation, the idShort of all inputVariable/value, outputVariable/value, and inoutputVariable/value shall be unique.

Input parameter of the operation

Output parameter of the operation

Parameter that is input and output of the operation

The value of an operation variable is a submodel element that is used as input and/or output variable of an operation.

Describes an argument or result of an operation via a submodel element

A property is a data element that has a single value.

Constraint AASd-007: If both the Property/value and the Property/valueId are present, the value of Property/value needs to be identical to the value of the referenced coded value in Property/valueId.

Data type of the value attribute

The value of the property instance

Reference to the global unique ID of a coded value

A range data element is a data element that defines a range with min and max.

Data type of the min und max attributes

The minimum value of the range

If the min value is missing, the value is assumed to be negative infinite.

The maximum value of the range

If the max value is missing, the value is assumed to be positive infinite.

A reference element is a data element that defines a logical reference to another element within the same or another Asset Administration Shell or a reference to an external object or entity.

External reference to an external object or entity or a logical reference to another element within the same or another Asset Administration Shell (i.e. a model reference to a Referable)

A relationship element is used to define a relationship between two elements being either referable (model reference) or external (external reference).

Reference to the first element in the relationship taking the role of the subject

Reference to the second element in the relationship taking the role of the object

A submodel element collection is a kind of struct, i.e. a logical encapsulation of multiple named values.

A submodel element list is an ordered list of submodel elements.

The numbering starts with Zero (0).

Constraint AASd-107: If a first level child element in a SubmodelElementList has a semanticId, it shall be identical to SubmodelElementList/semanticIdListElement.

Constraint AASd-114: If two first level child elements in a SubmodelElementList have a semanticId, they shall be identical.

Constraint AASd-115: If a first level child element in a SubmodelElementList does not specify a semanticId, the value is assumed to be identical to SubmodelElementList/semanticIdListElement.

Constraint AASd-108: All first level child elements in a SubmodelElementList shall have the same submodel element type as specified in SubmodelElementList/typeValueListElement.

Constraint AASd-109: If SubmodelElementList/typeValueListElement is equal to Property or Range, SubmodelElementList/valueTypeListElement shall be set and all first level child elements in the SubmodelElementList shall have the value type as specified in SubmodelElementList/typeValueListElement.

Defines whether order in list is relevant. If orderRelevant = false, the list represents a set or a bag.

Default: True

Submodel element contained in the list

Semantic ID which the submodel elements contained in the list match

The submodel element type of the submodel elements contained in the list

The value type of the submodel element contained in the list