Editing Codeshare agreement (section)

==Types of code sharing==
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There are several types of code sharing arrangements:
* Block space codeshare: A commercial (marketing) airline purchases a fixed number of seats from the administrating (operating/prime) carrier. A fixed price is typically paid, and the seats are kept away from the administrating carrier's inventory. The marketing airline decides on its own which booking classes the seats are sold in (the block of seats are optimized just like another aircraft cabin).
* Free flow codeshare: The airlines' inventory and reservation systems communicate in real-time by messaging, commonly IATA AIRIMP/PADIS messaging (TTY and EDIFACT). A booking class mapping is defined between the airlines. No seats are locked to any of the airlines, and any airline can sell any number of seats.
* Capped free flow: Basically the same as above, but capping (maximum number of seats) is defined for each of the marketing airlines participating in the codeshare with the administrating carrier.