# Doc technique avancé évolution périmètres https://www.npmjs.com/package/@betagouvpdc/perimeters ## Créer un nouveau dataset ```typescript= import { AbstractDataset } from '@betagouvpdc/perimeters'; export class MyDataset extends AbstractDataset { } ``` ## Utiliser le nouveau dataset ```typescript= import { buildApp, datasets } from '@betagouvpdc/perimeters'; import { MyDataset } from './MyDataset'; async function main(): Promise<void> { datasets.add(MyDataset); const migrator = buildApp({ app: { migrations: datasets }}); await migrator.prepare(); await migrator.run(); } ```
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