{
    "id": "http://trec-kba.org/schemas/v1.0/news-metadata.json",
    "description": "Metadata for corpus items from stream_source='news'.",
    "type": "object",
    "$schema": "http://json-schema.org/draft-03/schema#",
    "extends": [{"$ref": "http://trec-kba.org/schemas/v1.0/http-metadata.json"}],
    "properties": {
        "$schema": {
            "description": "URI of this JSON schema document.",
            "type": "string",
            "enum": ["http://trec-kba.org/schemas/v1.0/news-metadata.json"],
            "required": false,
            "default": "http://trec-kba.org/schemas/v1.0/news-metadata.json"
            },
 	"language": {
            "description": "Language of content (generated by aggregator)",
            "type": "string",
            "required": true
            },
	"is_duplicate": {
            "description": "Indicates whether this content is >80% similar to an item the aggregator has seen previously (generated by aggregator)",
            "type": "boolean",
            }
        }
    }