This topic contains the following Message data elements for custom interfaces in OXI:
HOLIDEX – used by InterContinental Hotels Group
Segments in Holidex messages for Reservations and Blocks:
- CF.confirmation number segment CA – block header segment
 - AC.accommodation segment CR – block detail segment including rates
 - AR.arrival segment CH – housing restriction Y segment
 - NM.guest name segment CD – housing restriction N segment
 - PH.phone segment IU – block inventory segment excluding rates
 - AH.home address segment CC – block deletion segment
 - AB.business address segment CO – response to block after Opera -> External
 - EM.email field segment
 - IF.information field segment
 - SV.service code segment HIRO:
 - FG.PC and alliance membership segment HP:A – HIRO Activation/Deactivation
 - AL.airline number segment HP:H – Hurdle Point Update
 - CO.company segment HP:M – Maximum Authorization Update
 - TA.travel agent segment HP:S – Strategic Value Update
 - SB.source of business segment HP:F – Flow Through Room Type
 - HP:P.Product Class Add/Change/Clear
 
Identifying message prefixes on the first line after the message type:
- AV.14-day forecast request from Opera to Holidex
 - AR.14-day forecast response from Holidex to Opera
 - LE.Reservation Comparison request from Opera to Holidex
 - LN.Reservation Comparison response from Holidex to Opera
 - DR.Reservation Comparison request for download sent by Opera to Holidex
 - VA.PC/SCC/Corporate ID/IATA/Frequent Flyer Number validation request and response
 - PC.Priority Club Enrollment from Opera to Holidex
 - PD.Priority Club Enrollment response from Holidex to Opera