.. index:: single: cytoscapejs_graph_language
.. _cytoscapejs_graph_language/0:

.. rst-class:: right

**object**

``cytoscapejs_graph_language``
==============================

Predicates for generating diagram files in the Cytoscape Exchange (CX2) JSON format.

| **Availability:** 
|    ``logtalk_load(diagrams(loader))``

| **Author:** Paulo Moura
| **Version:** 1:1:0
| **Date:** 2026-03-14

| **Compilation flags:**
|    ``static, context_switching_calls``


| **Implements:**
|    ``public`` :ref:`graph_language_protocol <graph_language_protocol/0>`
| **Imports:**
|    ``public`` :ref:`options <options/0>`
| **Provides:**
|    :ref:`graph_language_registry::language_object/2 <graph_language_registry/0::language_object/2>`
| **Uses:**
|    :ref:`list <list/0>`
|    :ref:`os <os/0>`
|    :ref:`term_io <term_io/0>`
|    :ref:`user <user/0>`

| **Remarks:**
|    (none)

| **Inherited public predicates:**
|     :ref:`options_protocol/0::check_option/1`  :ref:`options_protocol/0::check_options/1`  :ref:`options_protocol/0::default_option/1`  :ref:`options_protocol/0::default_options/1`  :ref:`graph_language_protocol/0::edge/6`  :ref:`graph_language_protocol/0::file_footer/3`  :ref:`graph_language_protocol/0::file_header/3`  :ref:`graph_language_protocol/0::graph_footer/5`  :ref:`graph_language_protocol/0::graph_header/5`  :ref:`graph_language_protocol/0::node/7`  :ref:`options_protocol/0::option/2`  :ref:`options_protocol/0::option/3`  :ref:`graph_language_protocol/0::output_file_name/2`  :ref:`options_protocol/0::valid_option/1`  :ref:`options_protocol/0::valid_options/1`  

.. contents::
   :local:
   :backlinks: top

Public predicates
-----------------

(no local declarations; see entity ancestors if any)

Protected predicates
--------------------

(no local declarations; see entity ancestors if any)

Private predicates
------------------

.. index:: section_started_/1
.. _cytoscapejs_graph_language/0::section_started_/1:

``section_started_/1``
^^^^^^^^^^^^^^^^^^^^^^

Tracks whether a JSON array section (``nodes`` or ``edges``) has already emitted at least one element.

| **Compilation flags:**
|    ``dynamic``

| **Template:**
|    ``section_started_(Section)``
| **Mode and number of proofs:**
|    ``section_started_(?atom)`` - ``zero_or_more``


------------

.. index:: in_nodes_section_/0
.. _cytoscapejs_graph_language/0::in_nodes_section_/0:

``in_nodes_section_/0``
^^^^^^^^^^^^^^^^^^^^^^^

Flag indicating if the exporter is currently writing the nodes section.

| **Compilation flags:**
|    ``dynamic``

| **Mode and number of proofs:**
|    ``in_nodes_section_`` - ``zero_or_one``


------------

.. index:: parent_stack_/1
.. _cytoscapejs_graph_language/0::parent_stack_/1:

``parent_stack_/1``
^^^^^^^^^^^^^^^^^^^

Current stack of open graph container identifiers.

| **Compilation flags:**
|    ``dynamic``

| **Template:**
|    ``parent_stack_(Stack)``
| **Mode and number of proofs:**
|    ``parent_stack_(?list(nonvar))`` - ``zero_or_one``


------------

.. index:: edge_counter_/1
.. _cytoscapejs_graph_language/0::edge_counter_/1:

``edge_counter_/1``
^^^^^^^^^^^^^^^^^^^

Current counter used to generate unique edge identifiers.

| **Compilation flags:**
|    ``dynamic``

| **Template:**
|    ``edge_counter_(Counter)``
| **Mode and number of proofs:**
|    ``edge_counter_(?integer)`` - ``zero_or_one``


------------

.. index:: node_counter_/1
.. _cytoscapejs_graph_language/0::node_counter_/1:

``node_counter_/1``
^^^^^^^^^^^^^^^^^^^

Current counter used to generate unique node identifiers.

| **Compilation flags:**
|    ``dynamic``

| **Template:**
|    ``node_counter_(Counter)``
| **Mode and number of proofs:**
|    ``node_counter_(?integer)`` - ``zero_or_one``


------------

.. index:: node_id_/2
.. _cytoscapejs_graph_language/0::node_id_/2:

``node_id_/2``
^^^^^^^^^^^^^^

Maps source node identifiers to generated CX2 numeric identifiers.

| **Compilation flags:**
|    ``dynamic``

| **Template:**
|    ``node_id_(Identifier,NumericId)``
| **Mode and number of proofs:**
|    ``node_id_(?nonvar,?integer)`` - ``zero_or_more``


------------

.. index:: containment_edge_/2
.. _cytoscapejs_graph_language/0::containment_edge_/2:

``containment_edge_/2``
^^^^^^^^^^^^^^^^^^^^^^^

Stores pending containment edges between parent and child nodes.

| **Compilation flags:**
|    ``dynamic``

| **Template:**
|    ``containment_edge_(ParentId,ChildId)``
| **Mode and number of proofs:**
|    ``containment_edge_(?integer,?integer)`` - ``zero_or_more``


------------

Operators
---------

(none)