Adobe InCopy Markup Language (.icml)
The ICML file extension stands for InCopy Markup Language, a format developed by Adobe Systems for their Adobe InCopy software, first released with Creative Suite 4 (CS4) in 2003. ICML files are used to store document text, graphics, and page layout settings, enabling seamless collaboration between writers and designers by linking portions of an Adobe InDesign document for editing. This format ensures efficient content management and real-time updates within the creative workflow.