{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://raw.githubusercontent.com/api-evangelist/biorxiv/main/json-schema/preprint-metadata.json",
  "title": "PreprintMetadata",
  "description": "Metadata for a single preprint from bioRxiv or medRxiv",
  "type": "object",
  "properties": {
    "doi": {
      "type": "string",
      "description": "Digital Object Identifier for the preprint",
      "pattern": "^10\\.\\d{4,}/.*$",
      "example": "10.1101/339747"
    },
    "title": {
      "type": "string",
      "description": "Title of the preprint",
      "minLength": 1
    },
    "authors": {
      "type": "string",
      "description": "Semicolon-separated list of authors in 'Last, First' format",
      "example": "Smith, John; Doe, Jane"
    },
    "author_corresponding": {
      "type": "string",
      "description": "Name of the corresponding author"
    },
    "author_corresponding_institution": {
      "type": "string",
      "description": "Institution of the corresponding author"
    },
    "date": {
      "type": "string",
      "format": "date",
      "description": "Date the preprint was posted (YYYY-MM-DD)",
      "example": "2021-06-01"
    },
    "version": {
      "type": "string",
      "description": "Version number of the preprint (1-based)",
      "pattern": "^[0-9]+$",
      "example": "1"
    },
    "type": {
      "type": "string",
      "description": "Type of submission",
      "enum": [
        "new results",
        "confirmatory results",
        "contradictory results",
        "null results",
        "tools and resources",
        "methods",
        "review article",
        "meta-analysis"
      ]
    },
    "license": {
      "type": "string",
      "description": "License applied to the preprint",
      "enum": [
        "cc_by",
        "cc_by_nc",
        "cc_by_nd",
        "cc_by_nc_nd",
        "cc_no_reuse",
        "cc0"
      ]
    },
    "category": {
      "type": "string",
      "description": "Subject category of the preprint",
      "example": "neuroscience"
    },
    "jatsxml": {
      "type": "string",
      "format": "uri",
      "description": "URL to the JATS XML full text of the preprint"
    },
    "abstract": {
      "type": "string",
      "description": "Abstract text of the preprint"
    },
    "published": {
      "type": "string",
      "description": "Published DOI if the preprint has been published, 'NA' if not yet published",
      "example": "NA"
    },
    "server": {
      "type": "string",
      "description": "Server hosting the preprint",
      "enum": ["biorxiv", "medrxiv"]
    }
  },
  "required": ["doi", "title", "date", "category", "server"]
}