> ## Documentation Index > Fetch the complete documentation index at: https://docs.emergence.ai/llms.txt > Use this file to discover all available pages before exploring further. # List Dimensions > Returns dimension definitions with their metric definitions. ## OpenAPI ````yaml /openapi/em-data-readiness-v2.yaml get /api/data-readiness/metrics/dimensions openapi: 3.1.0 info: title: EM Data Readiness Service description: Data Readiness Service API for managing workflows, metrics, and data quality version: 4.3.0-dev1 servers: [] security: - BearerAuth: [] tags: - name: Health description: Service health monitoring. Check service status and version information. - name: Root description: Root endpoint providing service information and navigation links. - name: Configuration description: Service configuration endpoints. View current configuration values. - name: Workflows description: >- Workflow configuration and execution management. Create, configure, and run data quality workflows including definitions, configurations, runs, and tasks. - name: Data Assets description: >- Data catalog entity management. Manage databases, schemas, and tables metadata. - name: Metrics description: >- Data quality metrics and scorecards. Calculate scores, view trends, and analyze dimensions. - name: Violations description: >- Data quality violation management. View, acknowledge, and remediate detected violations. - name: Glossary description: >- Business glossary management. Create, verify, and organize business terms and definitions. paths: /api/data-readiness/metrics/dimensions: get: tags: - Metrics summary: List Dimensions description: Returns dimension definitions with their metric definitions. operationId: list_dimensions parameters: - name: assessment_type in: query required: false schema: anyOf: - type: string - type: 'null' description: Filter by assessment type title: Assessment Type description: Filter by assessment type - name: page in: query required: false schema: type: integer minimum: 1 description: Page number (1-indexed) default: 1 title: Page description: Page number (1-indexed) - name: per_page in: query required: false schema: type: integer maximum: 100 minimum: 1 description: Items per page default: 20 title: Per Page description: Items per page responses: '200': description: Successful Response content: application/json: schema: $ref: '#/components/schemas/DimensionListResponse' '400': description: Bad Request - Invalid parameters content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '422': description: Validation Error content: application/json: schema: $ref: '#/components/schemas/HTTPValidationError' '500': description: Internal Server Error content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' security: - BearerAuth: [] components: schemas: DimensionListResponse: properties: dimensions: items: $ref: '#/components/schemas/DimensionResponse' type: array title: Dimensions description: List of dimensions pagination: $ref: '#/components/schemas/PaginationMeta' description: Pagination metadata type: object required: - dimensions - pagination title: DimensionListResponse description: List of dimension definitions. ErrorResponse: properties: error: $ref: '#/components/schemas/ErrorInfo' description: >- Error information object containing code, message, and optional details request_id: anyOf: - type: string - type: 'null' title: Request Id description: Request ID for debugging and support examples: - req_abc123xyz type: object required: - error title: ErrorResponse description: >- Standard error response model for API errors. Matches the structure returned by _handle_service_error in workflows/routes.py. The actual API response format is: { "error": { "code": "ERROR_CODE", "message": "Error message", "details": {...} }, "request_id": "optional-request-id" } HTTPValidationError: properties: detail: items: $ref: '#/components/schemas/ValidationError' type: array title: Detail type: object title: HTTPValidationError DimensionResponse: properties: id: type: string format: uuid title: Id description: Unique dimension identifier examples: - 550e8400-e29b-41d4-a716-446655440021 name: type: string title: Name description: Dimension name examples: - completeness display_name: anyOf: - type: string - type: 'null' title: Display Name description: Human-readable display name examples: - Completeness fqn: type: string title: Fqn description: Fully qualified name examples: - dimensions.completeness description: anyOf: - type: string - type: 'null' title: Description description: Description of the dimension examples: - Measures the completeness of metadata purpose: anyOf: - type: string - type: 'null' title: Purpose description: Purpose of the dimension assessment_type: type: string title: Assessment Type description: 'Type of assessment: ''metadata'' or ''data_quality''' examples: - metadata weight: type: string pattern: ^(?!^[-+.]*$)[+-]?0*\d*\.?\d*$ title: Weight description: Relative weight in overall score calculation examples: - '0.25' display_order: type: integer title: Display Order description: Display ordering examples: - 1 is_active: type: boolean title: Is Active description: Whether the dimension is active examples: - true metric_definitions: items: $ref: '#/components/schemas/MetricDefinitionSummary' type: array title: Metric Definitions description: Metric definitions in this dimension type: object required: - id - name - fqn - assessment_type - weight - display_order - is_active - metric_definitions title: DimensionResponse description: Full dimension definition with its metric definitions. PaginationMeta: properties: page: type: integer title: Page description: Current page number (1-indexed) per_page: type: integer title: Per Page description: Items per page total: type: integer title: Total description: Total number of items total_pages: type: integer title: Total Pages description: Total number of pages has_next: type: boolean title: Has Next description: Whether there is a next page has_prev: type: boolean title: Has Prev description: Whether there is a previous page type: object required: - page - per_page - total - total_pages - has_next - has_prev title: PaginationMeta description: >- Standard pagination metadata for list responses. This model provides consistent pagination information across all paginated API responses in the service. ErrorInfo: properties: code: type: string title: Code description: >- Error code identifier (e.g., 'WORKFLOW_NOT_FOUND', 'VALIDATION_ERROR') examples: - WORKFLOW_NOT_FOUND message: type: string title: Message description: Human-readable error message examples: - >- Workflow configuration with id '123e4567-e89b-12d3-a456-426614174000' not found details: anyOf: - additionalProperties: true type: object - type: 'null' title: Details description: >- Additional error details as a dictionary (flexible structure for business logic errors) examples: - workflow_id: 123e4567-e89b-12d3-a456-426614174000 type: object required: - code - message title: ErrorInfo description: >- Nested error information object. Note: This model uses an untyped dict for `details` to match the flexible error structure used throughout the service layer (see WorkflowServiceError and similar). This is distinct from ErrorDetail, which is used for structured validation errors. ValidationError: properties: loc: items: anyOf: - type: string - type: integer type: array title: Location msg: type: string title: Message type: type: string title: Error Type type: object required: - loc - msg - type title: ValidationError MetricDefinitionSummary: properties: id: type: string format: uuid title: Id description: Unique metric definition identifier examples: - 550e8400-e29b-41d4-a716-446655440020 name: type: string title: Name description: Metric name examples: - has_description display_name: anyOf: - type: string - type: 'null' title: Display Name description: Human-readable display name examples: - Has Description fqn: type: string title: Fqn description: Fully qualified name examples: - metrics.completeness.has_description unit: anyOf: - type: string - type: 'null' title: Unit description: Unit of measurement examples: - percent description: anyOf: - type: string - type: 'null' title: Description description: Description of the metric purpose: anyOf: - type: string - type: 'null' title: Purpose description: Purpose of the metric applicable_asset_types: anyOf: - items: type: string type: array - type: 'null' title: Applicable Asset Types description: Asset types this metric applies to examples: - - table - column is_active: type: boolean title: Is Active description: Whether the metric is active examples: - true type: object required: - id - name - fqn - is_active title: MetricDefinitionSummary description: Summary of a metric definition within a dimension. securitySchemes: BearerAuth: type: http scheme: bearer bearerFormat: JWT description: >- JWT Bearer token authentication. Include the token in the Authorization header as: `Authorization: Bearer `. The JWT must contain valid client_id, and project_id claims for tenant isolation and SDK routing. ````