Age prebuilt entity for a LUIS app

2025-06-13

Important

Language Understanding Intelligent Service (LUIS) will be fully retired on March 31, 2026. LUIS resource creation isn't available. Beginning on October 31, 2025, the LUIS portal will no longer be available. We recommend migrating your LUIS applications to conversational language understanding to benefit from continued product support and multilingual capabilities.

The prebuilt age entity captures the age value both numerically and in terms of days, weeks, months, and years. Because this entity is already trained, you do not need to add example utterances containing age to the application intents. Age entity is supported in many cultures.

Types of age

Age is managed from the Recognizers-text GitHub repository

Resolution for prebuilt age entity

The following JSON is with the verbose parameter set to false:

"entities": {
    "age": [
        {
            "number": 90,
            "unit": "Day"
        }
    ]
}

The following JSON is with the verbose parameter set to true:

"entities": {
    "age": [
        {
            "number": 90,
            "unit": "Day"
        }
    ],
    "$instance": {
        "age": [
            {
                "type": "builtin.age",
                "text": "90 day old",
                "startIndex": 2,
                "length": 10,
                "modelTypeId": 2,
                "modelType": "Prebuilt Entity Extractor"
            }
        ]
    }
}

The following example shows the resolution of the builtin.age entity.

  "entities": [
    {
      "entity": "90 day old",
      "type": "builtin.age",
      "startIndex": 2,
      "endIndex": 11,
      "resolution": {
        "unit": "Day",
        "value": "90"
      }
    }

Next steps

Learn about the currency, datetimeV2, and dimension entities.

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Age prebuilt entity for a LUIS app

Types of age

Resolution for prebuilt age entity

Next steps

Additional resources