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From: simpson@trwrb.UUCP.UUCP
Newsgroups: mod.computers.laser-printers
Subject: Re: PostScript Printers
Message-ID: <8704102055.AA25423@brillig.umd.edu>
Date: Sat, 4-Apr-87 09:59:48 EST
Article-I.D.: brillig.8704102055.AA25423
Posted: Sat Apr  4 09:59:48 1987
Date-Received: Sat, 11-Apr-87 18:43:12 EST
References: <8704040240.AA28258@brillig.umd.edu>
Sender: daemon@ucbvax.BERKELEY.EDU
Reply-To: trwrb!simpson@ucbvax.Berkeley.EDU (Scott Simpson)
Distribution: world
Organization: TRW EDS, Redondo Beach, CA
Lines: 15
Keywords: page description languages PostScript
Approved: laser-lovers@brillig.umd.edu

As for PostScript vs. DDL, I quote from the March 1987 IEEE Spectrum
magazine article "Desktop publishing: what it can and cannot do" by
Ronald K. Jurgen

     Among the typical page description languages available today for desktop
     systems are Adobe System's PostScript and Xerox Corp.'s Interpress.
     Instead of a page description language, a document-composition language
     like Imagen Corp.'s DDL may be used.  It conveys the format of a full
     document to the printer rather than describing only one page at a time.

Sounds like DDL is a somewhat different beast...
-- 
		Scott Simpson
		TRW Electronics and Defense Sector
		...{decvax,ihnp4,ucbvax}!trwrb!simpson