{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/event-registry/main/json-schema/article.json",
  "title": "Article",
  "description": "A news article returned by the Event Registry (NewsAPI.ai) API.",
  "type": "object",
  "properties": {
    "uri": {
      "type": "string",
      "description": "Unique article identifier used in API calls."
    },
    "title": {
      "type": "string",
      "description": "Article headline."
    },
    "body": {
      "type": "string",
      "description": "Article body text. Length is controlled by the articleBodyLen request parameter."
    },
    "url": {
      "type": "string",
      "format": "uri",
      "description": "Original article URL on the publisher's website."
    },
    "date": {
      "type": "string",
      "format": "date",
      "description": "Publication date (YYYY-MM-DD)."
    },
    "time": {
      "type": "string",
      "description": "Publication time (HH:MM:SS)."
    },
    "dateTime": {
      "type": "string",
      "format": "date-time",
      "description": "Combined publication date-time in ISO 8601 format."
    },
    "lang": {
      "type": "string",
      "description": "ISO 639-2 language code (e.g. 'eng', 'deu', 'fra')."
    },
    "isDuplicate": {
      "type": "boolean",
      "description": "Whether this article is a near-duplicate of another (e.g. wire syndication)."
    },
    "sentiment": {
      "type": ["number", "null"],
      "minimum": -1,
      "maximum": 1,
      "description": "Sentiment score from -1 (very negative) to +1 (very positive). Requires 'sentiment' in includeFields."
    },
    "source": {
      "$ref": "#/$defs/Source"
    },
    "authors": {
      "type": "array",
      "items": {
        "$ref": "#/$defs/Author"
      },
      "description": "Byline authors. Requires 'authors' in includeFields."
    },
    "concepts": {
      "type": "array",
      "items": {
        "$ref": "#/$defs/Concept"
      },
      "description": "Named entities mentioned in the article. Requires 'concepts' in includeFields."
    },
    "categories": {
      "type": "array",
      "items": {
        "$ref": "#/$defs/Category"
      },
      "description": "Topic categories. Requires 'categories' in includeFields."
    },
    "image": {
      "type": "string",
      "format": "uri",
      "description": "Article lead image URL. Requires 'images' in includeFields."
    },
    "eventUri": {
      "type": ["string", "null"],
      "description": "URI of the event cluster this article belongs to. Requires 'event' in includeFields."
    },
    "shares": {
      "type": "object",
      "properties": {
        "facebook": { "type": "integer" },
        "twitter": { "type": "integer" },
        "linkedin": { "type": "integer" },
        "pinterest": { "type": "integer" }
      },
      "description": "Social media share counts. Requires 'social' in includeFields."
    },
    "location": {
      "$ref": "#/$defs/Location",
      "description": "Geographic location associated with the article. Requires 'location' in includeFields."
    },
    "relevance": {
      "type": "number",
      "description": "Relevance score for the query. Requires 'metadata' in includeFields."
    }
  },
  "$defs": {
    "Source": {
      "type": "object",
      "description": "News source that published the article.",
      "properties": {
        "uri": { "type": "string" },
        "title": { "type": "string" },
        "url": { "type": "string", "format": "uri" },
        "ranking": {
          "type": "object",
          "properties": {
            "importanceRank": { "type": "integer" },
            "alexaGlobalRank": { "type": "integer" },
            "alexaCountryRank": { "type": "integer" }
          }
        },
        "sourceGroups": {
          "type": "array",
          "items": { "type": "string" }
        }
      }
    },
    "Author": {
      "type": "object",
      "properties": {
        "uri": { "type": "string" },
        "name": { "type": "string" },
        "isAgency": { "type": "boolean" }
      }
    },
    "Concept": {
      "type": "object",
      "description": "A named entity (person, organization, location, or wiki concept) mentioned in the article.",
      "properties": {
        "uri": { "type": "string" },
        "type": {
          "type": "string",
          "enum": ["person", "org", "loc", "wiki"]
        },
        "score": {
          "type": "number",
          "description": "Relevance score of the concept to the article."
        },
        "label": {
          "type": "object",
          "additionalProperties": { "type": "string" },
          "description": "Display labels keyed by ISO language code."
        }
      }
    },
    "Category": {
      "type": "object",
      "properties": {
        "uri": { "type": "string" },
        "label": { "type": "string" },
        "wgt": { "type": "integer", "description": "Category weight/confidence score." }
      }
    },
    "Location": {
      "type": "object",
      "properties": {
        "uri": { "type": "string" },
        "label": {
          "type": "object",
          "additionalProperties": { "type": "string" }
        },
        "type": { "type": "string" },
        "lat": { "type": "number" },
        "long": { "type": "number" },
        "country": {
          "type": "object",
          "properties": {
            "uri": { "type": "string" },
            "label": {
              "type": "object",
              "additionalProperties": { "type": "string" }
            }
          }
        }
      }
    }
  }
}