.. _auto_keyvalue_extract_multiple:

*EXTRACT THE VALUE OF A RESPONSE NAME FROM A KEYVALUE*
======================================================

Extracts one or more named entries from a KeyValue collection and returns them as a new KeyValue. Use this worker when you need to filter a KeyValue down to a specific subset of keys by name (case-sensitive).

When to use
-----------

Classification: **process**.

Tagged: ``extract``, ``filter``, ``key-value``, ``keyvalue``, ``lookup``, ``multiple``, ``transformations``.

Inputs
------

.. list-table::
   :header-rows: 1
   :widths: 20 20 20 20 20 20

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Kv1
     - kv1
     - keyvalue
     - —
     - 
     - Source KeyValue collection to extract entries from; connect the upstream KeyValue output whose keys you want to filter.
   * - Names
     - names_in
     - scalar
     - Unknown
     - 
     - One or more key names (case-sensitive) to extract from the KeyValue; defaults to 'Unknown' — replace with the exact key name(s) present in kv1.

Outputs
-------

.. list-table::
   :header-rows: 1
   :widths: 20 20 20 20

   * - Label
     - ID
     - Type
     - Description
   * - keyvalue_extract_multiple_output_1
     - keyvalue_extract_multiple_output_1
     - keyvalue
     - A new KeyValue collection containing only the entries whose names matched the values specified in names_in.

Disciplines
-----------

- data.dataset.transform

Runnable example
----------------

A runnable example is registered for this worker. Open the example workflow on the d3VIEW canvas: `/api/workflow/example?id=keyvalue_extract_multiple <https://www.d3view.com/api/workflow/example?id=keyvalue_extract_multiple>`_

.. raw:: html

   <hr style="margin-top:2em">
   <p style="font-size:11px;color:#888">
   Auto-generated from <code>transformation</code> schema. Worker id: <code>keyvalue_extract_multiple</code>. Schema hash: <code>662fcadb45ff</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>