<Tr> <Th> Type of format </Th> <Td> Vector image format </Td> </Tr> <Tr> <Th> Open format? </Th> <Td> No </Td> </Tr> <P> Adobe Illustrator Artwork (AI) is a proprietary file format developed by Adobe Systems for representing single - page vector - based drawings in either the EPS or PDF formats . The . ai filename extension is used by Adobe Illustrator . </P> <P> The AI file format was originally a native format called PGF . PDF compatibility is achieved by embedding a complete copy of the PGF data within the saved PDF format file . This format is not related to . pgf using the same name Progressive Graphics Format . </P>

What is the file extension for adobe illustrator