.. _auto_ontology_list_existing:

*LIST EXISTING ONTOLOGIES*
==========================

Lists all existing ARC2 ontology stores in the database, returning each store's name, triple count, table count, and detected node/edge types. Use this worker to inventory available ontology graphs before querying or modifying them.

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

Tagged: ``arc2``, ``inventory``, ``listing``, ``ontology``, ``rdf``, ``triplestore``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Name Filter
     - name_filter
     - text
     - —
     - 
     - Optional case-insensitive substring filter applied to store display names; leave blank to return all ontology stores in the database.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - Status
     - status
     - text
     - Plain-text status message indicating whether the listing operation succeeded or failed.
   * - Ontologies
     - ontologies
     - dataset
     - Tabular dataset with one row per matching ontology store, containing columns: store_name, display_name, triple_count, table_count, node_types, and edge_types.
   * - Count
     - count
     - number
     - Integer count of the total number of ontology stores returned after applying any name filter.
   * - Summary
     - summary
     - text
     - Human-readable narrative summarising the number of stores found and their total triple counts, suitable for logging or display.

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

- platform.ontology

.. raw:: html

   <hr style="margin-top:2em">
   <p style="font-size:11px;color:#888">
   Auto-generated from <code>platform</code> schema. Worker id: <code>ontology_list_existing</code>. Schema hash: <code>2a79e9794c8f</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>