DEC 18, 2003 — ISO (the International Organization for Standardization) has issued
three new standards for prepress digital data exchange using PDF. They are:
ISO 15930-4:2003, Graphic technology — Prepress digital data exchange using PDF — Part 4: Complete exchange of CMYK and spot colour printing data using PDF 1.4 (PDF/X-1a)
ISO 15930-5:2003, Graphic technology — Prepress digital data exchange using PDF — Part 5: Partial exchange of printing data using PDF 1.4 (PDF/X-2)
ISO 15930-6:2003, Graphic technology — Prepress digital data exchange using PDF — Part 6: Complete exchange of printing data suitable for colour-managed workflows using PDF 1.4 (PDF/X-3)