🚀 go-pugleaf

> ASN.1 ("Abstract Syntax Notation") is the common name of ISO dIS 8824,
> also a dpANS, and formerly promulgated as CCITT recommendation X.409.
> 
> I am looking for an implementation of the above draft standard.
> Has anyone done one?  It doesn't have to be complete.
> 
> I realize that this is not entirely appropriate to this group, but
> I couldn't think of a better group.  If I get no answers, I will
> repost to net.general.
> 
> Don Libes         {seismo,umcp-cs}!nbs-amrf!libes

After playing with a yacc grammar for X.409 for a while,  I've
given up for the moment.  It is not a LR(1) grammar, causing
yacc not to be usable.  The problems are primarily with the value
definitions.  In particular, it is difficult to tell the difference
between an IdentifierList and a NamedValueList.  There is some discussion
in net.lang.c++ about an object I/O system.  It would be nice to
see it combined with X.409.  C++ seems to be an ideal implementation
vehicle for X.409.

John Haller
AT&T Bell Laboratories
ihnp4!ihtnt!jhh

/* Written 12:50 pm  Mar 24, 1986 by libes@nbs-amrf.UUCP in ico:net.lan */
/* ---------- "ASN.1, ANSI/ISO dIs 8824, CCITT X.4" ---------- */
> ASN.1 ("Abstract Syntax Notation") is the common name of ISO dIS 8824,
> also a dpANS, and formerly promulgated as CCITT recommendation X.409.

> I am looking for an implementation of the above draft standard.
> Has anyone done one?  It doesn't have to be complete.

OMNICOM in Vienna, VA have an ANS.1 compiler as does Retix in Santa Monica,
CA.  I don't know anything about how good they are, but both claim that
their OSI software is written in portable C.  Retix also has several UNIX
implementations including a 4.2 BSD version.

RETIX, Santa Monica, CA (213) 829-4922
OMNICOM, Vienna, VA (703) 281-1135

			Doug McCallum
			Interactive Systems Corp
			{cbosgd, hao, ima}!ico!dougm

> ASN.1 ("Abstract Syntax Notation") is the common name of ISO dIS 8824,
> also a dpANS, and formerly promulgated as CCITT recommendation X.409.
> 
> I am looking for an implementation of the above draft standard.
> Has anyone done one?  It doesn't have to be complete.

Thanks to those who answered and told me that NBS has such an
implementation (and not being too disparaging about not knowing
what's available from my own employer).  I checked it out yesterday
and came away with the following comments:

It was done under contract by BBN.

It consists of a preprocessor that takes the grammar definition and
converts it to C code, with the type definitions corresponding
closely to C structures.  You can then make calls such as
"parse...", handing it a value, and it will give you back an
encoded byte stream.

And vice versa.  Values are expressed in display format, using
braces to separate fields, and including field names.

The person showing it to me suggested it was too slow to be of
actual use to anyone, but I'm not interested in performance so I'll
give it a shot.  (Besides, they were only running it on a VAX.  :-)

If you want to get a tape, you should contact NTIS, (301) 487-4650.
It is available at minimal cost.  The person at NBS who is in
charge of it is Jerry Mulvenna, (301) 921-2601.  The person at BBN
who wrote it is APOPE@BBN-UNIX.


I was also told that the following companies have implementations
(which may or may not be commercial products):

ITI: David E. Morgan (313) 665-4610
RETIX: 1547 Ninth Street/Santa Monica/CA 90401


Don Libes      {seismo,umcp-cs}!nbs-amrf!libes

> 
> ITI: David E. Morgan (313) 665-4610
...
> 
> Don Libes      {seismo,umcp-cs}!nbs-amrf!libes

The phone number and contact person for ITI is slightly out of date.
David Morgan no longer works for ITI and the phone number has changed.
I just talked to them and they currently only have testing services
and no software available.

> > ASN.1 ("Abstract Syntax Notation") is the common name of ISO dIS 8824,
> > also a dpANS, and formerly promulgated as CCITT recommendation X.409.

Some people asked me what the NTIS # is for this software.  I was
told it was not submitted to NTIS, because the NBS people didn't
want to get involved in answering questions about it.  So they have
provided it to a commercial company who will provide it at nominal
cost, and answer questions about it:

Richard Parenteau
Software Decisions, Inc.
24100 Southfield Rd, Suite 200
Southfield, MI  48075
(313) 559-5300

Don Libes      {seismo,umcp-cs}!nbs-amrf!libes