ISO 15930–1:2001: Graphic technology—Prepress digital data exchange—Use of PDF—Part 1: Complete exchange using CMYK data (PDF/X-1 and PDF/X-1a)
International Organization for Standardization
ISO 15930–3:2002: Graphic technology—Prepress digital data exchange—Use of PDF—Part 3: Complete exchange suitable for colour-managed workflows (PDF/X-3)
Graphic technology—Prepress digital data exchange—Use of PDF—Part 1: Complete exchange using CMYK data (PDF/X-1 and PDF/X-1a)