PNRArticles & Guides
Practical, plain-English reference articles for travel consultants and anyone who reads GDS output — the codes, formats and conventions behind a booking, written by the team that builds PNRpro.
Amadeus vs Sabre vs Galileo vs Worldspan: reading each format
The four systems display the same booking differently. Here's how to recognise which one you're looking at, and what changes line to line.
Reading a PNRHow to read a PNR segment line, field by field
Carrier, flight, class, date, city pair, status, times — every field in that dense one-line segment, decoded with worked examples.
Booking classesBooking-class (RBD) letters, explained by cabin and airline
Why the same letter means First on one airline and Economy on another — and how to check the real cabin instead of guessing.
DOCS & APISSSR DOCS & APIS: the passport data airlines require
What Advance Passenger Information is, how the DOCS entry is built from a passport, and what each field in it means.
ItinerariesConnections, stopovers, open-jaws and ARNK, explained
The difference between a plane change and a stay, why the 24-hour rule exists, and how to present each cleanly in a quote.