.. _auto_keyvalue_extract_curve:

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

Extracts a curve (vector) associated with a named response from a KeyValue collection. Supply the key name and a comparison operator to locate the matching entry; use this worker when you need to pull a specific time-history or curve out of a KeyValue store for downstream processing.

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

Classification: **process**.

Tagged: ``curve``, ``extract``, ``keyvalue``, ``lookup``, ``response``, ``vector``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Kv1
     - kv1
     - keyvalue
     - —
     - 
     - The KeyValue collection to search; connect the upstream KeyValue output that contains the named response curves.
   * - Key Name
     - key_name
     - scalar
     - Unknown
     - 
     - Case-sensitive name of the key whose associated curve should be extracted; defaults to 'Unknown' — change to the exact response name (e.g. 'HEAD_ACCEL_X').
   * - Operator
     - operator
     - scalar
     - eq
     - 
     - Comparison operator used to match the key name against entries in the KeyValue; default is 'eq' (exact match) — use 'contains', 'starts_with', etc. for partial matching.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - keyvalue_extract_curve_output_1
     - keyvalue_extract_curve_output_1
     - vector
     - The extracted curve (vector) corresponding to the matched key; typically a time-history array ready for further signal processing or KPI evaluation.

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

- cae.postprocessing.extraction
- data.curve.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_curve <https://www.d3view.com/api/workflow/example?id=keyvalue_extract_curve>`_

.. 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_curve</code>. Schema hash: <code>aece88cec293</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>