.. _Settings_ExternalGraphURI:

Settings > External Graph URI
-----------------------------

This feature from the :ref:`SettingsTab` can be used to set a so-called *external graph URI* for the
current asset collection.

The external graph URI is an optional alias for the asset collection identifier, used when exporting an
asset collection as serialized RDF graph, see :ref:`Export_ExportAsAnRDFFile`.
It can also be used on import of interconnected RDF files when they are loaded into different asset
collections - to appropriately re-route their ``owl:imports`` references.

.. note::
   If the external graph URI is left unspecified, the asset collection is always identified using the URN
   that you can see under :ref:`Settings_GraphURI`.

.. caution::
   Although often similar, graph URIs have nothing to do with namespaces and prefixes.
   Namespaces and prefixes identify individual assets while graph URIs identify the whole
   graph in a data set.


**See Also**

* :ref:`Export_ExportAsAnRDFFile`
* :ref:`Settings_GraphURI`

**Further Reading on TopBraid**

* :ref:`introduction`