There are a number of new fields which will initially be left blank until Agent CRS systems start to collect and calculate the new elements.
However, the most significant change from AIRConnect's point of view is the expansion of the Departure Date (FTDA) by two characters to include the year.
This change moves all subsequent fields by two characters and will necessitate upgrading to version 4.92e or later.
Changes have already been made in AIRConnect version 4.92e but we await the supply of DISH 23 HOT files from IATA so we can complete testing. IATA advise these should be available from mid 2019.
Link to IATA DISH23 document DISH-23-FAQ.pdf