<commit_before>.. _Historian Index:
============================
VOLTTRON Historian Framework
============================

Historian Agents are the way by which device, actuator, datalogger, and
analysis are captured and stored in some sort of data store. Historians exist for the following storage options:

- A general :ref:`SQL Historian <SQL-Historian>` implemented for MySQL and SQLite
- :ref:`MongoDB Historian <Mongo-Historian>`
- :ref:`Forward-Historian>` for sending data to another VOLTTRON instance
- :ref:`OpenEIS Historian <Analytics-Historian>`

Other implementations of historians can be created by following the
:ref:`developing historian agents <Developing-Historian-Agents>` section of
the wiki.

Historians are all built upon the BaseHistorian which provides general
functionality the specific implementations build upon.<commit_msg>add mqtt historian to historians index.rst<commit_after>.. _Historian Index:
============================
VOLTTRON Historian Framework
============================

Historian Agents are the way by which device, actuator, datalogger, and
analysis are captured and stored in some sort of data store. Historians exist for the following storage options:

- A general :ref:`SQL Historian <SQL-Historian>` implemented for MySQL and SQLite
- :ref:`MongoDB Historian <Mongo-Historian>`
- :ref:`Forward-Historian>` for sending data to another VOLTTRON instance
- :ref:`OpenEIS Historian <Analytics-Historian>`
- :ref:`MQTT Historian <MQTT-Historian>` Forwards data to an MQTT broker

Other implementations of historians can be created by following the
:ref:`developing historian agents <Developing-Historian-Agents>` section of
the wiki.

Historians are all built upon the BaseHistorian which provides general
functionality the specific implementations build upon.
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