type: object
description: Document metadata
properties:
  url:
    type: string
    description: Document URL
    example: https://example.com/document.pdf
  title:
    type: string
    description: Document title
    example: Example Document
  author:
    type: string
    description: Document author
    example: John Doe
  metadata:
    type: object
    description: Additional metadata
    additionalProperties:
      type: string
    example:
      department: Engineering
      category: Technical