XI Tracks 
Note
You should use the enhanced CTS for transporting XI objects
You use an XI track (Exchange Infrastructure track) to transport design objects from various Integration Repositories or configuration objects from various Integration Directories.
The following development states exist for the development of XI objects:
Development
Consolidation
Production
An Integration Repository or an Integration Directory exists for each of these states; each repository or directory runs on a separate Java EE instance.
The following figure shows an XI track as a schema:

XI Track