TRI-Ada'95 Trip Report
This is the "Mathis DRAFT TRI-Ada Trip Report,"
written by Bob Mathis
with errata and addenda at the end.
From: "Robert F. Mathis" <email@example.com>
Subject: Mathis DRAFT Trip Report
Date: 16 Nov 95 08:34:16 EST
After the TRI-Ada'95 Conference, this is my attempt at a summary trip report.
Other people said they would also try to write summaries and post them to this
list. I had a good time reporting on the Conference and I hope that people got
something out of it. The best sessions were undoubtedly the ones I didn't
attend, so I appreciate others adding to my comments. -- Bob Mathis
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My own personal conclusion at the end of the conference was very positive. This
is much better than the ending feeling of some other recent Ada conferences.
Final registration was over 600 (more than expected). Terry Doran, Jim Moore,
and other members of the committee deserve our thanks and congratulations. Job
On the other hand, I think the current TRI-Ada model needs considerable work.
SIGAda is planning the next big conference for December 1-6, 1996, in
Philadelphia. Comments and suggestions are welcome. This list
(TriAda95@ocsystems.com) is a good place to discuss TRI-Ada'95, reactions to it,
and suggestions for next year. After this list goes away (November 30, 1995),
the ARA list (firstname.lastname@example.org) is an appropriate place to discuss Ada
Intermetrics announced the first Ada95 validation two weeks ago. ACT and SGI
validated on the exhibit floor. OC Systems is 98 and 44/100s complete. R&R
Software was giving away some free copies of their Ada95 compiler for Windows NT
or Windows 95. Tartan announced their SHARK compiler. TLD will be going with
GNAT for Ada95. Thomson has teamed with Intermetrics for the production of a
student compiler and then professional level products. Rational continues to
offer a broad range of products and migrate them to Ada95. DEC is teaming with
Rational and ACT for the different Alpha operating systems. DDC-I announced
their expectation of validating by the end of 1995. GreenHills was demonstrating
their multi-lingual, multi-platform tools. Irvine Compiler is migrating their
existing compiler to Ada95.
Chuck Engle (head of the AJPO) announced at the closing plenary, that he had
received official notice from Microsoft that they have accepted our Ada95-Win32
bindings (developed by Intermetrics, tested by LabTec, accepted by Ada compiler
developers in the Windows95 and Windows NT environments) and will be
distributing them from the Microsoft server.
There were many other vendors. They were offering advanced specialized tools
and/or services. I hope that attendees found what they were looking for and I
hope that vendors will feel free to post to this list information about their
activities, products, and successes.
At the main opening session, Hal Hart (SIGAda Chairman) presented SIGAda awards
to Chuck Engle, Mark Gerhart, Rick Conn, Robert Dewar, Jean Ichbiah, and Tucker
Silicon Graphics provided some advance displays for the opening plenary session
(Tuesday). It gave the session a big conference, high-tech feel. John Mashey
(Silicon Graphics) gave the opening keynote stressing the trends in technology
to larger and faster computing and how this would change programming and human
interaction. It was a very nice keynote presentation looking toward the future
and opening minds to new approaches. Software innovation will be essential for
bridging the gap between more capable hardware and pretty much the same wetware
(human beings). E-mail is a very low-bandwidth communication medium and really
inadequate to convey the details, or the content, or the feel of this
presentation. Sorry, you had to be there.
In the Wednesday plenary, Richard Stallman talked about the historical
background and philosophy of the Free Software Foundation. "Free" means freely
usable and redistributable under the "copy-left" arrangement, not necessarily
free of cost. GNU and GCC served as the underlying framework for GNAT. It was an
interesting, but rambling talk. GNAT has changed the way people think about the
availability of Ada compilers. It was very useful to have Stallman himself
describe his philosophy, which he thinks of as a moral position. Robert Dewar,
head of the GNAT project, has restated and explained this philosophy frequently
in various Ada forums including a local LA SIGAda talk the night before.
Stallman expressed a general approval for the changes made in Ada95. He would
have made overload resolution less dependent on the context and redefinition of
functions on tagged types require a more explicit declaration of intent by the
programmer, but he didn't consider these major. At the end of the talk, there
was a discussion of potential changes in copyright law which would have a
negative effect on free software and other intellectual property. He pointed to
an upcoming article in the January issue of Wired.
John Barnes gave the Thursday morning plenary address. John was a member of both
the Ada83 and Ada95 design teams and author of the best selling Ada textbook.
John traced the history of programming languages with some conclusions about
good features of Ada and weaknesses of some other languages. Ada provides
freedom from errors; this is more important than freedom to do anything you want
in a program. Multiple inheritance is the spaghetti of object-oriented
inheritance. Four good features of Ada95 -- object-oriented, protected types,
child libraries, and flexible access. John summarized his opinion of different
programming languages: Smalltalk is flexible and reliable, C++ is flexible and
efficient, Ada83 reliable and efficient, but best of all Ada95 has all three
(flexible, reliable, and efficient).
Peter Coffee, PCWeek, gave the Friday plenary address and talked about an Ada
program he had done to exercise the Pentium division bug about a year ago. He
also discussed the difficulty others had in translating his program into C. He
talked about requirements for high reliable microprocessor software used in
non-computer appliances. The fraction of software that goes into desktop
applications is very small. Peter has very positive feelings about the
usefulness of Ada and concerns about the popularity of C++; but Ada is being
mentioned less and less in magazine articles. He mentioned John McCormick's
positive experience using Ada in a project course. He encouraged Ada people to
be more active in publicizing their successes.
Steve Zeigler's presentation, describing the experience of Verdix (now part of
Rational) in developing and maintaining its code base--which is about equally
divided between Ada and C code--provides compelling evidence that belongs in the
arsenal of every Ada advocate. Steve has been collecting data for a number of
years and has analyzed it carefully to discover patterns. Here are some of the
most striking results he presented:
- Ada code required 4.59 fixes per thousand lines of code, compared with 9.21
- Ada code contained .096 customer-reported defects per thousand lines of code,
compared with .676 for C.
- Development costs for Ada code were $6.62 per noncomment/nonblank line,
compared with $10.52 for C.
There were some very good papers and presentations at this conference. I
attended a few sessions and reported on them informally. I really want to
encourage others (even the authors themselves) to post summaries.
The Best Paper award went to "DVM: An Object-Oriented Framework for Building
Large Distributed Ada Systems," by Christopher J. Thompson (Hughes Aircraft) and
Vincent Cellier (Hughes Canada). The Best Presentation award went to "Ada95 as
Implementation Language for Object-Oriented Designs," by Stephane Barbey (Swiss
Federal Institute of Technology).
SIGAda Working Groups
The Working Groups are an important part of SIGAda's activities. ASISWG
announced its new draft and distributed it on disk (it will be available on
their Web page in a couple of weeks). There was discussion about a licensing
arrangement to encourage sharing Ada code without losing commercial rights. JAVA
and Ada were discussed at a number of sessions. (JAVA does not stand for "Just
Another Version of Ada.") Some of the working groups and the executive committee
got bogged down in administrative and procedural details. Information about
working group activities are available on the SIGAda Web page
http://www.acm.org/sigada/. Most of the working groups are reorienting their
work toward the different environment of Ada95.
Patrick McDermott (a technical recruiter from Phoenix, AZ) (email@example.com) said he
had over 450 job listings for Ada programmers. These are sales openings,
permanent programming openings, consulting, and so forth. The word needs to get
out that there are Ada jobs out there.
The Ada Resource Association is developing a new poster, Ferruccio's "The Vision
of Ada." Readers of these notes can request one by sending e-mail with the
subject "ARA Poster" to firstname.lastname@example.org (that's Bob Mathis the
Executive Director of the ARA). Please send the usual mailing information plus
phone, fax, and other relevant contact information. The ARA also has some
remaining copies of last year's poster showing a surfer. You can also request
one of these via e-mail.
Paul Whittington offered AdaSAGE CD ROMs "to all who E-Mail
me with a request to do so. Please include your complete land address. I will
put you on a list in as received order. We will mail to list members in order
until we run out of CDs so get your order in ASAP." Or you can download any or
all of the CD ROM from ftp://sageftp.inel.gov/pub/sage/cdrom002.
Ada Policy Summary
Chuck Engle was passing out some small cards describing Ada Policy. I've copied
the contents here because it's a short summary of what's important. The AdaIC
(800-232-4211 or 703-681-2466) has copies if you want one.
Why is Ada appropriate?
Support for large, complex systems
Interoperability and maintainability
Modifiable, reliable, portable, easily integrated, etc.
DoD core competency, lower lifecycle costs
International standard (ANSI, ISO, FIPS)
Only internationally-standardized object-oriented language
Only language with required validation
Promotes reuse, portability
Not locked into proprietary vendor
Most companies settle on a standard, why not DoD
60-80% of software costs are in maintenance
Ada best in FAA and SEI scores (capability, cost, risk, etc.)
Ada leads in MITRE reliability and maintainability comparisons
DODD 3405.1 Ada is the preferred common HOL.
Based on lifecycle cost, prefer use of : (1) COTS and advanced software
technology, when no government modification or maintenance during lifecycle; (2)
Ada; (3) DoD-approved standard HOL, if waiver granted.
Use Ada for all major upgrades (1/3 or more of lines total).
Army extensions: HQDA ltr 25-92-1, 25-95-1
Ada for all modifications of 1/3 or more of functional component.
SQL is approved for DBMSs.
4GLs permitted for prototypes, short-term, ad-hoc systems, non-Ada prototype
cannot be fielded.
Navy extensions: NAVINST5234.2A
Ada for modifications of 1/3 or more of computer software configuration item or
sub-system specification, within 5 years.
Waivers granted only on substantiation of economic analysis.
Air Force extensions: SAF/AQK Action memo
Distinguishes exceptions/waivers, gives details on each.
Exempts individual-use, unique, in-house applications.
SAF/AQK Info Memo Interprets term "cost effective" in Congressional Ada mandate
All three Services permit baselined ("project-validated") compilers - projects
can keep using same compiler throughout lifecycle (after validation certificate
Ada Information Clearinghouse
800/232-4211 or 703/681-2466
Defense Information Systems Agency, Center for Software
Ada, The Language For a Complex World
-- -- -- -- -- -- -- -- End of Report -- -- -- -- -- -- --
From: "Robert F. Mathis" <email@example.com>
Subject: Re: Mathis DRAFT TRI-Ada Trip Report
Date: 20 Nov 95 21:44:22 EST
There are a few updates I have learned about during the week after the
The dates for the 1996 conference are only specified as "the first week of
December 1996". The sheet of paper passed out at the conference was in error.
Sunday December 1st is on Thanksgiving weekend.
While discussion on Tri-Ada 96 can occur in any forum that people like, it will
be most effective if it occurs on the SIGAda-Interest mailing list. This is the
one read by the sigada officers and the Tri-Ada 96 committee. Anyone may join
the list by sending mail to Brad Balfour (firstname.lastname@example.org).
The mailing list is email@example.com.
-- Bob Mathis
Subject: GNAT Validation Statement for TRI-Ada Trip Report
Date: Tue, 21 Nov 1995 11:21:17 +0100
Contribution to Joint Trip Report for TRI-Ada '95
On-site Validations for GNAT on Three SGI Platforms Performed
At the occasion of the TRI-Ada 95 conference the first three
GNAT implementations on the Indy, Indigo-2, and Onyx platforms were
validated for Ada 95 using the official ACVC 2.0 testsuite.
The validation was done during the conference
exhibition for GAT version 3.00 by a team from IABG, the German
Ada Validation Facility. This GNAT version will subsequently be
available for other GNAT platforms. The Ada implementations
demonstrated conforming behavior according to the Ada Validation
Procedures Vers. 4.0. However, validated status cannot be announced
before the AJPO has issued the validation certificates. This is
expected for early December.
Statement approved by ACT, and IABG.
+ Michael Tonndorf Tel. +49 89 6088 2477 +
+ IABG Dept ITE Fax. +49 89 6088 3418 +
+ Einsteinstr. 20 +
+ D-85521 Ottobrunn GERMANY +