Leisoft AAS Client Library

TypeScript / JavaScript AAS metamodel and client library by Leisoft for both browser and Node.js.

Table of Contents

• Introduction
• Features Overview
• Metamodel
• Client
• Treemodel
• ID Creation
• Version
• AAS Compatibility
• License
• Credits

Introduction

const assetId = new LeisoftAasId();
assetId.idType = 'asset';
const shellId = LeisoftAasId.from(assetId);
shellId.idType = 'shell';
const shell: AssetAdministrationShell = {
    id: shellId.toUrl('https'),
    assetInformation: {
        assetKind: AssetKind.Instance,
        globalAssetId: assetId.toUrn(),
    },
    modelType: ModelType.AssetAdministrationShell,
    idShort: 'leisoftServer',
    displayName: [
        { language: 'en', text: 'Leisoft Server' },
    ],
};
const aasRepoClient = new AasRepoClient({
    protocol: AAS_REPO_PROTOCOL,
    host: AAS_REPO_SERVER,
    port: AAS_REPO_PORT,
});
try {
    await aasRepoClient.createShell(shell);
    console.log('AAS created successfully');
}
catch (error) {
    console.error('Error creating AAS:', (error as AasRequestError).messages);
}

Features Overview

• AAS metamodel, descriptors, metadata, value only and REST specific types
• AAS client interfaces
  • AAS repository client
  • Submodel repository client
  • AAS registry client
  • Submodel registry client
  • Concept description repository client
  • Discovery API
  • Description API
• AAS tree model
• AAS compliant ID creation
• IdShortPath calculation

Metamodel

TypeScript types for the entire AAS metamodel and the API specific types

const smId = new LeisoftAasId();
smId.idType = 'submodel';
const sm: Submodel = {
    id: smId.toUrn(),
    modelType: ModelType.Submodel,
    idShort: 'City',
    kind: ModellingKind.Instance,
    description: [
        { language: 'en', text: 'City of Tanna' },
        { language: 'de', text: 'Stadt Tanna' },
    ],
    submodelElements: [
        {
            modelType: ModelType.Property,
            idShort: 'CityName',
            value: 'Tanna',
            valueType: DataTypeDefXsd.String
        } as Property
    ]
};
console.log(JSON.parse(JSON.stringify(sm)));

Client

All clients share the same base class and implement a specific service of the AAS API.

const smRepoClient = new SubmodelRepoClient({
    host: 'api.leisoft.de',
    port: 443,
    protocol: 'https',
    auth: {
        token: oidcClient.jwt
    } as TokenAuthParams
});
const streetNumber = await smRepoClient.getSubmodelElementValue(
    smId, 'address.street.number'
) as Property;
console.log(streetNumber.value);

Treemodel

Using the AAS treemodel submodels and submodel element trees can be used like arrays and maps. IdShortPaths are calculated automatically and searches in the element tree are possible.

const smModel = new SubmodelTree(sm);
if (smModel.has('ManufacturerName')) {
    smModel.delete('ManufacturerName');
}
const sensorRange: Range = {
    idShort: 'SensorRange',
    modelType: ModelType.Range,
    min: String(8.5),
    max: String(31.2),
    valueType: DataTypeDefXsd.Decimal
};
smModel.set(sensorRange);

const phones = smModel.deepSearch(
    (element: SubmodelElement) => {
        return /^Leisoft-Car-.*$/i.test(element.idShort);
    },
    (element: SubmodelElement) => {
        const dm = langStringsToMap(element.description!);
        dm.set('en', translate(dm.get('de')!, 'en'));
        element.description = mapToLangStrings(dm);
    },
    4 // max depth
);
console.log(phones);

ID Creation

Standard compliant ID creation for all identifiables in the AAS metamodel and beyond

• Sensible defaults
• Hierarchical structure for all use cases
• URL and URN generation

const id = new LeisoftAasId();
console.log(id.toUrn());
// urn:client.leisoft.de:entities:ids:88d0c3f7-e82e-4735-ac16-9237050d71b3

id.domain = 'project-x.leisoft.de';
id.idType = 'shell';
id.units = ['tanna', 'central', 'engineering'];
id.id = 'Leisoft-Tanna-Server-1';
console.log(id.toUrl('https'));
// https://project-x.leisoft.de/tanna/central/engineering/shells/ids/Leisoft-Tanna-Server-1

Version

• (upcoming) 1.0.x first planned stable major release
• (current) 0.2.x initial preliminary release
• 0.1.0 test release

AAS Compatibility

• AAS 3.0.x

License

This project is licensed under the Leisoft License.

Credits

Developers:

• Christian Leistner ([email protected], LinkedIn)
• Johannes Rabausch