AddConnection
=============

Add a connection between two referenced objects,
and properties associated with the new connection.

Parameters
----------

* :ref:`class <class>`:
  Name of the class for the connection.
* :ref:`src <ref>`:
  Reference to the object that is the source of the connection.
* :ref:`dst <ref>`:
  Reference to the object that is the destination of the connection.
* [optional] :ref:`properties <properties>`
* [optional] :ref:`if_not_found <if_not_found>`

Details
-------

The source and destination references (**src** and **dst**) correspond to
references created with the another command within the transaction.

The **properties** are key-value pairs associated with the connection.
Check :ref:`properties <properties>` for more details.

Examples
--------

Add an Entity of the class "Person" and an image, and create a Connection
between the two objects:

.. code-block:: python

    [ {
        "AddEntity" : {
            "class" : "Person",
            "_ref": 1,
            "properties" : {
                "name" :  "Jane Polansky",
                "gender": "F",
                "email":  "jane.p@xyz.com"
            }
        }
    },{
        "AddEntity" : {
            "class" : "Person",
            "_ref": 2,
            "properties" : {
                "name" :  "Jon Doe",
                "gender": "M",
                "email":  "jon.doe@xyz.com"
            }
        }
    }, {
        "AddConnection" : {
            "class" : "BestFriendsForever",
            "src" : 1,
            "dst" : 2,
            "properties" : {
                "place_met" : "Fake Street 123",
                "date" :    {"_date", "Mon Apr 10 10:59:24 PDT 1970"}
            }
        }
    } ]