EMF file format
The Enhanced Metafile (EMF) file system began its journey of evolution when Microsoft included the Windows Metafile (WMF) format in the 1992 documentation of the Windows 3.1 Operating System. The WMF format was used to store collections of graphical drawing, the type peculiar with Windows positional graphics. However, due to some major compatibility issues, WMF was improved to EMF in the Windows NT 3.1 update. EMF formats stores coloured graphical data using the RGB colour scheme, CMYK is not supported. In recent times, the EMF format is incorporated into driver software for printers, thus assisting PCs to communicate graphical data to installed printers.
Unlike the 16-bit WMF format, EMF supports a wider device communication channel – 32-bit. Files with .emf extensions permit cross-compatibility between technologies that support positional graphics alone or bitmaps alone. EMF documents do not store data alone, but also include instructions on how constituent data should be handled.