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TECHDOCS-4676: Update read-from-versioned-layer.md
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Resolves: TECHDOCS-4676
Signed-off-by: Marilyn Vidas marilyn.vidas@here.com
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mvidas authored Jun 20, 2024
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## Create `VersionedLayerClient`

You can use the `VersionedLayerClient` object to request any data and partition metadata version from a [versioned layer](https://developer.here.com/documentation/data-user-guide/portal/layers/layers.html#versioned-layers). When you request a particular version of data from the versioned layer, the partition you receive in the response may have a lower version number than you requested. The version of a layer or partition represents the catalog version in which the layer or partition was last updated.
You can use the `VersionedLayerClient` object to request any data and partition metadata version from a [versioned layer](https://www.here.com/docs/bundle/data-api-developer-guide/page/rest/partitions.html). When you request a particular version of data from the versioned layer, the partition you receive in the response may have a lower version number than you requested. The version of a layer or partition represents the catalog version in which the layer or partition was last updated.

**To create the `VersionedLayerClient` object:**

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## Get partition metadata from a versioned layer

Partition metadata from a [versioned layer](https://developer.here.com/documentation/data-user-guide/portal/layers/layers.html#versioned-layers) consists of the following information about the partition:
Partition metadata from a [versioned layer](https://www.here.com/docs/bundle/data-api-developer-guide/page/rest/getting-data-versioned.html) consists of the following information about the partition:

- Data handle
- ID
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- Using the Metadata Service API
- Using the Query Service API

You can get partition metadata using the Query Service API only if the partition has the HERE tile scheme. For more information on the HERE tile scheme, see [Partitions](https://developer.here.com/documentation/data-user-guide/portal/layers/partitions.html).
You can get partition metadata using the Query Service API only if the partition has the HERE tile scheme. For more information on the HERE tile scheme, see [Partitions](https://www.here.com/docs/bundle/data-api-developer-guide/page/rest/partitions.html).

For performance reasons, it is best to use the Query Service API only to get metadata for a specific partition. For batch processes, and to get metadata for many partitions or all partitions in a layer, use the Metadata Service API.

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## Get data from a versioned layer

You can request any version of data from a [versioned layer](https://developer.here.com/documentation/data-user-guide/portal/layers/layers.html#versioned-layers). When you request a particular version of data from the versioned layer, the partition you receive in the response may have a lower version number than you requested. The version of a layer or partition represents the catalog version in which the layer or partition was last updated.
You can request any version of data from a [versioned layer](https://www.here.com/docs/bundle/data-api-developer-guide/page/rest/getting-data-versioned.html). When you request a particular version of data from the versioned layer, the partition you receive in the response may have a lower version number than you requested. The version of a layer or partition represents the catalog version in which the layer or partition was last updated.

**To get data from the versioned layer:**

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