{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://finlight.me/schemas/article.json",
  "title": "Article",
  "description": "A financial news article enriched with AI-driven sentiment analysis and company entity extraction",
  "type": "object",
  "required": ["link", "title", "publishDate", "source", "language"],
  "properties": {
    "link": {
      "type": "string",
      "format": "uri",
      "description": "Original URL of the article"
    },
    "title": {
      "type": "string",
      "description": "Article headline"
    },
    "publishDate": {
      "type": "string",
      "format": "date-time",
      "description": "Date and time when the article was published"
    },
    "source": {
      "type": "string",
      "description": "Domain of the news source"
    },
    "language": {
      "type": "string",
      "pattern": "^[a-z]{2}$",
      "description": "ISO 639-1 language code",
      "examples": ["en", "de", "fr", "es"]
    },
    "sentiment": {
      "type": "string",
      "enum": ["positive", "negative", "neutral"],
      "description": "AI-generated sentiment classification for the article"
    },
    "confidence": {
      "type": "number",
      "minimum": 0,
      "maximum": 1,
      "description": "Confidence score for the sentiment classification (0.0 to 1.0)"
    },
    "summary": {
      "type": "string",
      "description": "AI-generated brief summary of the article"
    },
    "images": {
      "type": "array",
      "items": {
        "type": "string",
        "format": "uri"
      },
      "description": "URLs of images associated with the article"
    },
    "content": {
      "type": "string",
      "description": "Full article content text"
    },
    "companies": {
      "type": "array",
      "items": {
        "$ref": "company.json"
      },
      "description": "Companies mentioned and extracted from the article"
    },
    "createdAt": {
      "type": "string",
      "format": "date-time",
      "description": "Timestamp when Finlight ingested the article"
    },
    "revisedDate": {
      "type": "string",
      "format": "date-time",
      "description": "Timestamp when the article was last revised by the publisher"
    },
    "isUpdate": {
      "type": "boolean",
      "description": "Whether this article is an update to a previously published piece"
    },
    "categories": {
      "type": "array",
      "items": {
        "$ref": "article-category.json"
      },
      "description": "Content categories assigned to the article"
    },
    "countries": {
      "type": "array",
      "items": {
        "type": "string",
        "pattern": "^[A-Z]{2}$"
      },
      "description": "ISO 3166-1 alpha-2 country codes relevant to the article"
    }
  },
  "additionalProperties": false
}