.. 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)