{
	"lexicon": 1,
	"id": "app.bsky.richtext.facet",
	"defs": {
		"main": {
			"type": "object",
			"description": "Annotation of a sub-string within rich text.",
			"required": ["index", "features"],
			"properties": {
				"index": { "type": "ref", "ref": "#byteSlice" },
				"features": {
					"type": "array",
					"items": { "type": "union", "refs": ["#mention", "#link", "#tag"] }
				}
			}
		},
		"mention": {
			"type": "object",
			"description": "Facet feature for mention of another account. The text is usually a handle, including a '@' prefix, but the facet reference is a DID.",
			"required": ["did"],
			"properties": {
				"did": { "type": "string", "format": "did" }
			}
		},
		"link": {
			"type": "object",
			"description": "Facet feature for a URL. The text URL may have been simplified or truncated, but the facet reference should be a complete URL.",
			"required": ["uri"],
			"properties": {
				"uri": { "type": "string", "format": "uri" }
			}
		},
		"tag": {
			"type": "object",
			"description": "Facet feature for a hashtag. The text usually includes a '#' prefix, but the facet reference should not (except in the case of 'double hash tags').",
			"required": ["tag"],
			"properties": {
				"tag": { "type": "string", "maxLength": 640, "maxGraphemes": 64 }
			}
		},
		"byteSlice": {
			"type": "object",
			"description": "Specifies the sub-string range a facet feature applies to. Start index is inclusive, end index is exclusive. Indices are zero-indexed, counting bytes of the UTF-8 encoded text. NOTE: some languages, like Javascript, use UTF-16 or Unicode codepoints for string slice indexing; in these languages, convert to byte arrays before working with facets.",
			"required": ["byteStart", "byteEnd"],
			"properties": {
				"byteStart": { "type": "integer", "minimum": 0 },
				"byteEnd": { "type": "integer", "minimum": 0 }
			}
		}
	}
}