Level 1

Component diagram

Component description

Components	Description
IRS	The IRS builds a digital representation of a product (digital twin) and the relationships of items the product consists of in a hierarchical structure. The result is an item graph in which each node represents a digital item of the product - this graph is called "Item Graph".
IRS API	The IRS API is the Interface over which the Data Consumer is communicating.
IrsController	The IrsController provides a REST Interface for retrieving IRS processed data and job details of the current item graph retrieval process.
IrsItemGraphQueryService	The IrsItemGraphQueryService implements the REST Interface of the IrsController.
JobOrchestrator	The JobOrchestrator is a component which manages (start, end, cancel, resume) the jobs which execute the item graph retrieval process.
RecursiveJobHandler	The RecursiveJobHandler handles the job execution recursively until a given abort criteria is reached or the complete item graph is build.
TransferProcessManager	The TransferProcessManager handles the outgoing requests to the various data services. A job is processed in this order: Initiation of the job and preparation of the stream of DataRequests RecursiveJobHandler requesting for AAS via the Digital Twin registry. Analyzing the structure of the AAS response by collecting the traversal aspect. Requesting submodel data for given items of next level. Recursively iteration over step 2-4 until an abort criterion is reached. Assembles the complete item graph.
BlobStore	The BlobStore is the database where the intermediate relationships and tombstones are stored as BLOBs during job processing. When complete, the job will take these intermediate BLOBs and consolidate them in the job response. The BLOBs are single-use only and will not be re-used for future jobs.
JobStore	The JobStore is the database where the jobs with the information about the requested item are stored. Completed and failed jobs will be deleted from the JobStore after their configured time-to-live is reached.
Digital Twin Client	The Digital Twin Client is the interface to the Digital Twin Registry. It provides an interface for the Asset Administration Shells.
Decentralized Digital Twin Client	In a decentralized network, the Digital Twin Client connects to the EDC which then proxies the requests to the digital twin registry on provider side.
EDC Client	The EDC Client is used to communicate with the EDC network, negotiate contracts and retrieve submodel data.
EssController	The EssController provides a REST Interface to perform BPN investigations of supply chain.
PolicyStoreController	The PolicyStoreController provides a REST Interface for getting, adding and deleting accepted IRS EDC policies. These policies will be used to validate usage policies of EDC contract offers.

Components

Description

IRS

The IRS builds a digital representation of a product (digital twin) and the relationships of items the product consists of in a hierarchical structure.

The result is an item graph in which each node represents a digital item of the product - this graph is called "Item Graph".

IRS API

The IRS API is the Interface over which the Data Consumer is communicating.

IrsController

The IrsController provides a REST Interface for retrieving IRS processed data and job details of the current item graph retrieval process.

IrsItemGraphQueryService

The IrsItemGraphQueryService implements the REST Interface of the IrsController.

JobOrchestrator

The JobOrchestrator is a component which manages (start, end, cancel, resume) the jobs which execute the item graph retrieval process.

RecursiveJobHandler

The RecursiveJobHandler handles the job execution recursively until a given abort criteria is reached or the complete item graph is build.

TransferProcessManager

The TransferProcessManager handles the outgoing requests to the various data services. A job is processed in this order:

Initiation of the job and preparation of the stream of DataRequests
RecursiveJobHandler requesting for AAS via the Digital Twin registry.
Analyzing the structure of the AAS response by collecting the traversal aspect.
Requesting submodel data for given items of next level.
Recursively iteration over step 2-4 until an abort criterion is reached.
Assembles the complete item graph.

BlobStore

The BlobStore is the database where the intermediate relationships and tombstones are stored as BLOBs during job processing. When complete, the job will take these intermediate BLOBs and consolidate them in the job response. The BLOBs are single-use only and will not be re-used for future jobs.

JobStore

The JobStore is the database where the jobs with the information about the requested item are stored. Completed and failed jobs will be deleted from the JobStore after their configured time-to-live is reached.

Digital Twin Client

The Digital Twin Client is the interface to the Digital Twin Registry. It provides an interface for the Asset Administration Shells.

Decentralized Digital Twin Client

In a decentralized network, the Digital Twin Client connects to the EDC which then proxies the requests to the digital twin registry on provider side.

EDC Client

The EDC Client is used to communicate with the EDC network, negotiate contracts and retrieve submodel data.

EssController

The EssController provides a REST Interface to perform BPN investigations of supply chain.

PolicyStoreController

The PolicyStoreController provides a REST Interface for getting, adding and deleting accepted IRS EDC policies. These policies will be used to validate usage policies of EDC contract offers.