{ "$schema":               "https://json-schema.org/draft/2020-12/schema",
  "$id":                   "https://schemas.mpai.community/MMC/V2.5/data/TextWord.json",
  "title":                 "Text Word V2.5",
  "description":           "A word of a Text, with the time it spans and the confidence with which it was recognised.",
  "type":                  "object",
  "additionalProperties":  false,
  "required":              [ "Header", "TextWordID", "TextWordData" ],

  "properties":            {

    "Header":              { "type": "string", "const": "MMC-TXW-V2.5", "description": "Text Word Header - Standard MMC-TXW-Vx.y" },
    "MInstanceID":         { "type": "string", "description": "Identifier of the M-Instance (Virtual Space) where this Text Word is or is intended to be located." },
    "UEnvironmentID":      { "type": "string", "description": "Identifier of the U-Environment (Real Space) where this Text Word is or is intended to be located." },
    "TextWordID":          { "type": "string", "description": "Unique identifier of this Text Word instance." },
    "TextWordTime":        { "$ref": "https://schemas.mpai.community/OSD/V1.5/data/SimpleTime.json", "description": "Time this Text Word was produced." },
    "TextQualifier":       { "$ref": "https://schemas.mpai.community/TFA/V1.5/data/TextQualifier.json",
                             "description": "Qualifier providing information on Sub-Types, Formats and Attributes of the Text." },

    "TextWordData":        { "type": "object", "additionalProperties": false, "description": "Text Word Data.", "properties": {
      "Time":              { "$ref": "https://schemas.mpai.community/OSD/V1.5/data/SimpleTime.json", "description": "Time span of the word." },
      "ConfidenceScore":   { "type": "number", "minimum": 0, "maximum": 1, "description": "Confidence with which the word was recognised, 0 to 1." },
      "Word":              { "type": "array", "items": { "type": "string" }, "description": "The word, as one or more strings." } } },

    "DataXMData":          { "$ref": "https://schemas.mpai.community/PTF/V1.0/data/DataExchangeMetadata.json",
                             "description": "MPAI-PTF Data Exchange Metadata providing provenance, authorisation, legal and security information on the Data." },

    "DescrMetadata":       { "type": "string", "maxLength": 2048, "description": "Human-readable descriptive metadata of the Text Word (plain text, max 2048 characters)." } } }