Capturing promoted properties in the orch.

There are a number of ways of doing this.
1. Declare the properties you wish to use on the outbound message, using the same properties schema used for the header.
In a message assignment you can copy the message context:
outputmessage(*) = inputmessage(*); //copies all properties
outputmessage(Your.property) = inputmessage(Your.property)
The output pipeline will demote the properties into the appropraite message fields.

1. You can specifically assign values to the outputmessage using distinguished fields or the xpath function
outputmessage.field = inputmessage(Your.property);
xpath(outputmessage,<xpath of field>) = inputmessage(Your.property)