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From: rchui@neptune.nswc.navy.mil (Chui)
Newsgroups: comp.lang.postscript
Subject: Re: PostScript headers
Message-ID: <1991Jun15.201234.10918@relay.nswc.navy.mil>
Date: 15 Jun 91 20:12:34 GMT
References: <1991Jun11.092741.27041@cheops.qld.tne.oz.au> <1991Jun11.133128.20685@nntp-server.caltech.edu>
Sender: news@relay.nswc.navy.mil (0000-Admin(0000))
Reply-To: rchui@neptune.nswc.navy.mil (Chui)
Organization: Naval Surface Warfare Center, Dahlgren VA
Lines: 8

I'd like to know what is the absolute definitive way to recognise a
>Postscript file.

The only "absolute definitive" way to recognize one is to send it to a printer
or other display device that's running Adobe PostScript.  If the printer
accepts it, it was PostScript;  otherwise, it wasn't.

	I don't think this is good way to recognize the Postscript file.