Once all the management layers and knowledge’s structure are declared, you can start registering all your student’s data and retrieve their statistics on our API. Hence, you can declare Event objects and manage them. For instance, if you need to store results, you can delare an Event object with a EventResult type.

{{ :api1:data:event_v1.png?600 | Event schema }}

===Object resources===

^ Property     ^ Type      ^ Description         ^
| type | Text | The type of this Event object. “EventResult”, “EventRead”, etc. |
| student_id | Integer | Student identifier |
| knowledge_node_student_id | Integer | The knowledge cell/student pair this result belongs to |
| knowledge_node_id | Integer | The knowledge node related to event identifier |
| generated_at | DateTime | Time at which the event has been done |
| payload | Text | The payload of this event. If you deal with an Event of a “EventResult” type you can send either “0” or “100” |
| standard | String | standard used to declare the payload |
| instance_id | Integer | The instance this event belongs to |
| expected_at | Timestamp | The date the event as expected to happen |
| created_at | Timestamp | The creation date of the object |
| updated_at | Timestamp | The last update date of the object |

===Create (POST)===

^ Method | POST |
^ URL | /events |

==Parameters (*Required parameters)==

^ Property     ^ Type      ^ Description         ^
| knowledge_node_student_id | Integer | The knowledge cell/student pair this result belongs to |
| type | Text | The type of this Event object. “EventResult”, “EventRead”, etc. |
| payload | Text | The payload of this event. If you deal with an Event of a “EventResult” type you can send either “0” or “100” |

==Send the request (JSON input example)==

<code>
{
	knowledge_node_student_id: 1,
	type: “EventResult”,
	payload: “100”
}
</code>

==Get the response (JSON output example)==

<code>
{
	id: 1,
	knowledge_node_student_id: 1,
	type: “EventResult”,
	payload: “100”,
	instance_id: 1,
	created_at: 2014-09-17 09:21:03,
	updated_at: 2014-09-17 09:21:03
}
</code>

===Fetch (GET)===

^ Method | GET |
^ URL | /events/{event_id} |

If no event_id is provided it will fetch all the events for your instance.

== Get the response (JSON output example)==

<code>
{
	id : 1,
	knowledge_node_student_id : 1,
	type: “EventResult”,
	payload: “100”,
	instance_id : 1,
	created_at : 2014-09-17 09:21:03,
	updated_at : 2014-09-17 09:21:03
}
</code>


<code>
[{
	id : 1,
	knowledge_node_student_id : 1,
	type: “EventResult”,
	payload: “100”,
	instance_id : 1,
	created_at : 2014-09-17 09:21:03,
	updated_at : 2014-09-17 09:21:03
},
{
	id : 2,
	knowledge_node_student_id : 1,
	type: “EventResult”,
	payload: “0”,
	instance_id : 1,
	created_at : 2014-09-17 09:21:03,
	updated_at : 2014-09-17 09:21:03
}]
</code>


===Fetch events by Knowledge Node Student===
Instead of using event id to retrieve related data, you can fetch all events for a given Knowledge Node Student.

^ Method | GET |
^ URL | /knowledge_node_students/{knowledge_node_student_id}/events |