# Custom metadata

{% hint style="warning" %}
Metadata is persisted, so if you want to send it only for one trip, you need to remove it at the end of the trip, on the [`sdkStateChanged(state: State)`](https://docs.drivequant.com/trip-analysis/android/triplistener)callback, by checking if `state` is `INACTIVE`.
{% endhint %}

## Set metadata

You can add additional metadata to your trip by calling the following method:

{% tabs %}
{% tab title="DriveKitTripAnalysis" %}

```kotlin
fun setTripMetaData(metaData: HashMap<String, String>?)
```

{% endtab %}
{% endtabs %}

The metadata must be represented as a key/value object where the key and value have a String type.

The metadata can be set any time before the end of a trip.

If metadata is sent, it will also be added to the push data request in the metaData field.

## Get metadata

It is possible to get a copy of configured metadata thanks to the following method on DriveKitTripAnalysis:

{% tabs %}
{% tab title="DriveKitTripAnalysis" %}

```kotlin
fun getTripMetaData(): HashMap<String, String>?
```

{% endtab %}
{% endtabs %}

{% hint style="info" %}
Note: Any modification on the returned object has no effect on the metadata sent with a trip.
{% endhint %}

## Update metadata

To update a value in metadata, call the following method:

{% tabs %}
{% tab title="DriveKitTripAnalysis" %}

```kotlin
fun updateTripMetaData(key: String, value: String?)
```

{% endtab %}
{% endtabs %}

## Delete a specific metadata

To delete a specific value in metadata, call the following method:

{% tabs %}
{% tab title="DriveKitTripAnalysis" %}

```kotlin
fun deleteTripMetadata(key: String)
```

{% endtab %}
{% endtabs %}

## Delete all metadata

To delete all values in metadata, call this method:

{% tabs %}
{% tab title="DriveKitTripAnalysis" %}

```kotlin
fun deleteTripMetadata()
```

{% endtab %}
{% endtabs %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.drivequant.com/trip-analysis/android/custom-metadata.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.