Re: XPL Language (Steve Meyer)
10 Aug 2000 00:08:48 -0400

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From: (Steve Meyer)
Newsgroups: comp.compilers
Date: 10 Aug 2000 00:08:48 -0400
Organization: Compilers Central
References: 00-06-118 00-07-016 00-07-075 00-08-018 00-08-028
Keywords: history, design

On 4 Aug 2000 21:41:30 -0400, Heinz W. Wiggeshoff <>

>"Andy Johnson" ( writes:
>> "Paul Dineen" <> wrote in message
>>> Sander Vesik ( wrote:
>>>: Peter Flass <> wrote:
>>>: > A web site has been established for material related to the XPL
>>>: > programming language at:
>>>: >
>>>: > XPL, developed in the 1970's was one of the earliest "compiler

> My copy of A Compiler Generator, W.M.McK.,J.J.H.,D.B.W. is c/r 1970.
> Quoting from the preface, "The XPL system was developed by the authors
> over a three year period ...", thus making it a child of the 1960's.
>>>: > compilers", was widely ported, and was the basis for a number of other
>>>: > languages such as the PL/M family.

I think PL/M and XPL came from different worlds that did not
communicate. I think people saw XPL as too high level. I think PL/M
came from other system level languages such as PL/360 (?). My
recollection may not be right. I think it is amazing that at same
time those system implementation languages were considered great
advances, modern programming languages from BCPL to B to C was being
developed in obscurity. /Steve

Steve Meyer Phone: (415) 296-7017
Pragmatic C Software Corp. Fax: (415) 296-0946
220 Montgomery St., Suite 925 email:
San Francisco, CA 94104

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