.. auto-generated by script ../../../../utils/nxdl2rst.py from the NXDL source NXgraph_root.nxdl.xml

.. index::
    ! NXgraph_root (base class)
    ! graph_root (base class)
    see: graph_root (base class); NXgraph_root

.. _NXgraph_root:

============
NXgraph_root
============

**Status**:

  base class, extends :ref:`NXobject`

**Description**:

  An instance of a graph.

**Symbols**:

  The symbols used in the schema to specify e.g. dimensions of arrays.

**Groups cited**:
  :ref:`NXgraph_edge_set`, :ref:`NXgraph_node_set`

.. index:: NXgraph_node_set (base class); used in base class, NXgraph_edge_set (base class); used in base class

**Structure**:

  .. _/NXgraph_root/nodes-group:

  **nodes**: (optional) :ref:`NXgraph_node_set`


  .. _/NXgraph_root/relation-group:

  **relation**: (optional) :ref:`NXgraph_edge_set`



Hypertext Anchors
-----------------

List of hypertext anchors for all groups, fields,
attributes, and links defined in this class.


* :ref:`/NXgraph_root/nodes-group </NXgraph_root/nodes-group>`
* :ref:`/NXgraph_root/relation-group </NXgraph_root/relation-group>`

**NXDL Source**:
  https://github.com/nexusformat/definitions/blob/main/base_classes/NXgraph_root.nxdl.xml