[OS X TeX] Emacs 22.92, %! and TeXShop

Chris Goedde cgoedde at condor.depaul.edu
Fri Jan 26 23:07:09 CET 2007

On Jan 26, 2007, at 3:41 PM, Frank STENGEL wrote:

> Isn't it
> %!PS
> That should be the first four bytes of a postscript file?

No, historically %! was sufficient to identify a postscript file.  
Files that conform to the Postscript document structure convention  
are supposed to start with %!PS-Adobe-3.0 (for example, for PS3), but  
%! is a valid first line for a postscript file. In fact, postscript  
files that are valid but don't conform to all the structural  
conventions are supposed to start with %! (or at least not the full %! 

Chris Goedde

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