> ## Documentation Index > Fetch the complete documentation index at: https://docs.coreweave.com/llms.txt > Use this file to discover all available pages before exploring further. # Move dataset entries to a split > Moves every entry matching `filters` (the listing's filters, including metadata) and `row_ids` to `split`. `fraction` keeps that share of the matching groups, ranked by a digest of the group id, so a group is never divided and a later call can take its share from what remains. Use `val` to hold a population out of training, so evaluations measure the model on users it never saw. A change that would place one group in more than one split returns 409 `group_split_conflict`. ## OpenAPI ````yaml openapi/model-distillation/management.openapi.yaml PATCH /projects/{alias}/datasets/{datasetId}/entries openapi: 3.1.0 info: title: CoreWeave Model Distillation Management API version: 1.0.0 description: | Manage providers, projects, routing versions, datasets, relabeling, fine-tunes, evaluations, and analytics. This is the same API used by Model Distillation. servers: - url: https://forge.coreweave.com/api/distillation/v1 description: Production security: - WandbCredential: [] tags: - name: Providers description: OpenAI-compatible endpoints, credentials, model catalogs, and pricing. - name: Projects description: Stable project identity and project-level information. - name: Routing description: Versioned model targets, weights, and request parameters. - name: Datasets description: >- Reproducible data snapshots, entries, relabeling, and reusable model outputs. - name: Fine-tunes description: Supervised fine-tuning jobs and hosted model artifacts. - name: Evaluations description: Head-to-head, exact-match, and categorization evaluations. - name: Analytics description: Project traffic, token, error, and estimated-cost read models. - name: UI preferences description: Per-project display preferences used by the UI. paths: /projects/{alias}/datasets/{datasetId}/entries: parameters: - $ref: '#/components/parameters/WandbEntity' - $ref: '#/components/parameters/ProjectAlias' - $ref: '#/components/parameters/DatasetId' patch: tags: - Datasets summary: Move dataset entries to a split description: >- Moves every entry matching `filters` (the listing's filters, including metadata) and `row_ids` to `split`. `fraction` keeps that share of the matching groups, ranked by a digest of the group id, so a group is never divided and a later call can take its share from what remains. Use `val` to hold a population out of training, so evaluations measure the model on users it never saw. A change that would place one group in more than one split returns 409 `group_split_conflict`. operationId: updateDatasetEntrySplits parameters: - name: dry_run in: query description: Validate and report the change, then roll it back. required: false schema: type: boolean default: false requestBody: required: true content: application/json: schema: type: object properties: split: type: string enum: - train - val filters: default: [] description: >- Select entries matching every filter, as in the entry listing. maxItems: 10 type: array items: oneOf: - type: object properties: field: type: string const: entry_id operator: type: string enum: - equals - not_equals value: type: string pattern: ^[A-Za-z0-9_-]{22}$ required: - field - operator - value additionalProperties: false - type: object properties: field: type: string enum: - input - original_output operator: type: string enum: - contains - not_contains value: type: string minLength: 1 maxLength: 500 required: - field - operator - value additionalProperties: false - type: object properties: field: type: string const: relabel_status operator: type: string enum: - equals - not_equals value: type: string enum: - pending - processing - relabeled - unchanged - errored required: - field - operator - value additionalProperties: false - type: object properties: field: type: string const: split operator: type: string enum: - equals - not_equals value: type: string enum: - train - val required: - field - operator - value additionalProperties: false - type: object properties: field: type: string const: metadata key: type: string minLength: 1 maxLength: 256 operator: type: string enum: - equals - not_equals value: anyOf: - type: string maxLength: 500 - type: number - type: boolean required: - field - key - operator - value additionalProperties: false - type: object properties: field: type: string const: eval_applied operator: type: string enum: - equals - not_equals value: type: string format: uuid pattern: >- ^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$ required: - field - operator - value additionalProperties: false row_ids: description: Select only these row ids. minItems: 1 maxItems: 5000 type: array items: type: string minLength: 1 maxLength: 512 fraction: description: >- Move only this share of the selected groups, ranked by a digest of the group id so groups stay whole. type: number exclusiveMinimum: 0 exclusiveMaximum: 1 required: - split additionalProperties: false responses: '200': description: Entries were moved, or would be for a dry run. content: application/json: schema: $ref: '#/components/schemas/DatasetEntrySplitResult' default: $ref: '#/components/responses/Error' components: parameters: WandbEntity: name: Wandb-Entity in: header required: false description: >- Accessible personal or team entity. Omit to use the authenticated user's default entity. schema: type: string ProjectAlias: name: alias in: path required: true schema: type: string pattern: ^[a-z0-9-]{1,64}$ DatasetId: name: datasetId in: path required: true schema: type: string format: uuid schemas: DatasetEntrySplitResult: type: object required: - dry_run - matched - groups - updated - revision - entry_counts - group_conflicts properties: dry_run: type: boolean matched: type: integer description: Entries selected by the filters, row ids, and fraction. groups: type: integer description: Groups the selected entries belong to. updated: type: integer description: Selected entries that were in a different split. revision: type: integer description: >- The dataset revision after the change; unchanged by a dry run or a no-op. entry_counts: $ref: '#/components/schemas/DatasetEntryCounts' group_conflicts: type: array items: type: string description: >- Groups spanning more than one split. A real change with conflicts is rejected. DatasetEntryCounts: type: object required: - total - train - val properties: total: type: integer train: type: integer val: type: integer ErrorResponse: type: object required: - error properties: error: type: object required: - message - type properties: message: type: string type: type: string example: error: message: Project 'missing' not found in entity 'your-team' type: not_found responses: Error: description: Request failed. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' securitySchemes: WandbCredential: type: http scheme: bearer bearerFormat: wandb API key or JWT description: >- A wandb API key or wandb JWT. Browser sessions are exchanged by the Model Distillation web app backend; job capabilities are internal only. ````