The OSIsoft Message Format

v1.0

Overview

The OSIsoft Message Format (OMF) defines a set of message headers and message bodies that are used to generate compliant messages for inputting data into either an on-premises PI System, OSIsoft Cloud Services, or another compliant backend system.

OMF can be used to develop data acquisition applications on platforms and in languages for which there are no supported OSIsoft libraries.

The OMF specification does not define or depend on any particular binary message protocol (HTTP, AMQP, Kafka, and so on.) Rather, it is based on an abstract message type, where a message consists of a set of key / value pairs, called the header, and a binary payload, called the body. OMF messages can thus be constructed using any message protocol that defines headers and bodies. For up-to-date information about the specific binary protocols currently supported by OSIsoft systems, consult the Qi and PI Connector Relay documentation.