Message exchange and attributes

References allow identification and communication between objects in the System Platform environment. Every object, every attribute, and every property can be uniquely referenced. Those references are communicated over the messaging system. The Message Exchange is the object-to-object communications protocol used by Application Server, OMI, InTouch, and other System Platform components.

All object attributes have properties, such as Value and Quality. Any data read or written to or from these attributes over Message Exchange is tracked. If an operation cannot be performed, the requesting client is notified.

Message Exchange provides the following features and information:

• Guaranteed response

• Name signatures

• Status and data quality

• Message order preservation within a priority system

• AppEngine-to-AppEngine buffering

• Publish-subscribe heartbeats