$schema: https://json-schema.org/draft/2020-12/schema
description: A specialized workflow description that includes all concrete data, parameters,
  and settings required to execute a specific workflow run
type: object
properties:
  '@type':
    const: WorkflowInstance
    description: Type identifier for workflow instance
  '@id':
    type: string
    format: uri
    description: Unique identifier for this workflow instance
  name:
    type: string
    description: Human-readable name for this workflow instance
  description:
    type: string
    description: Description of this workflow instance
  describedBy:
    type: string
    format: uri
    description: URI reference to the workflow definition this instance is based on
  hasInput:
    type: array
    description: Input parameters with bound artifacts and concrete values
    items:
      type: object
      properties:
        '@type':
          const: Input
        '@id':
          type: string
          format: uri
        name:
          type: string
        description:
          type: string
        hasArtifact:
          type: object
          properties:
            '@type':
              const: Artifact
            '@id':
              type: string
              format: uri
            value:
              description: Concrete value bound to this parameter
          required:
          - '@type'
          - value
      required:
      - '@type'
      - hasArtifact
  hasOutput:
    type: array
    description: Expected output parameters for this workflow instance
    items:
      type: object
      properties:
        '@type':
          const: Output
        '@id':
          type: string
          format: uri
        name:
          type: string
        description:
          type: string
      required:
      - '@type'
  hasSubProcess:
    type: array
    description: Sub-processes contained in this workflow instance
    items:
      type: object
      properties:
        '@type':
          enum:
          - Process
          - Workflow
        '@id':
          type: string
          format: uri
        name:
          type: string
      required:
      - '@type'
  hasDataLink:
    type: array
    description: Data links between processes in this workflow instance
    items:
      type: object
      properties:
        '@type':
          const: DataLink
        '@id':
          type: string
          format: uri
        hasSource:
          type: string
          format: uri
        hasSink:
          type: string
          format: uri
      required:
      - '@type'
  executionSettings:
    type: object
    description: Engine and environment configuration for execution
    properties:
      engine:
        type: string
        description: Name of the workflow execution engine
        examples:
        - cwltool
        - zoo-project
        - nextflow
        - snakemake
      version:
        type: string
        description: Version of the execution engine
      environment:
        type: string
        description: Execution environment type
        enum:
        - container
        - conda
        - local
        - hpc
        - cloud
        default: local
      scheduler:
        type: string
        description: Job scheduler or execution backend
        examples:
        - local
        - slurm
        - kubernetes
        - aws-batch
      resources:
        type: object
        description: Resource requirements and limits
        properties:
          cpu:
            type:
            - string
            - number
            description: CPU requirement (cores or description)
          memory:
            type: string
            description: Memory requirement (e.g., '4GB', '512MB')
          disk:
            type: string
            description: Disk space requirement
          gpu:
            type:
            - string
            - number
            description: GPU requirement
    additionalProperties: true
  readyForExecution:
    type: boolean
    description: Whether all required parameters are bound and the workflow is ready
      to execute
    default: false
  validatedAt:
    type: string
    format: date-time
    description: Timestamp when this workflow instance was validated as execution-ready
  configurationHash:
    type: string
    description: Hash of the configuration for reproducibility tracking
required:
- '@type'