Data base technology

EURBIICRQ Report

383 jnade available

in XCC publications.

:ny rcpplier of microprocessors softwart! who does not rereive a questionnaireand wishes to caatr:bute, is hsked to contact KC. #f ; are also anxious to receive the comments Jf any users of cicropmcessor high level languages or application packages who feel that they have valuable practicsl experience. I;lterested parties may zantact: Lylldon Morgan, Mlcroaracessor DeueloD;itent Team Leader at the KC, &ford Road, Hanh’taster HI 7ED. TeIephone: 061-228 6333. _-

Hi!?h-‘_eftel E_Oln~w@e C~wwte~Architecture intarnatiana$

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.'coc73

During November, 1973, tke "Symposium on Hightevel language Computer Architectcre" was helli at t.heCoIIege Park Campus of tke Lini%$ersiQr of Haryland. Itwas tha first conference devoted to this speciat area sf computer arckit?ct;I?-e. U.S. Since tnen, a great de+I tas happened. those in Arm?_ Government Agencies 'ncluding Navy and Air FQTW have expressed interest 172 Papers orli this type of computer architaccure. this subject have also been pJblisked at internaticnai conferences; these inc*!ude authors from France, Gelmany, Sweden, United Kingdom, S@in, and &an. In additicn,the rapid advance oi‘ tke semiconductor device ‘technoiogy offers a reek opportunity to trade off tlie costs between xmputer harclvare ard siiFt&are; and the high-revel language romauter arckitecture is one promising approsck to acco~?pli:.h?ngthetradeoff. lew subjects suck as Data Dase computers and Symbolic Execution T%r!ng Rab? beto%e ilr,pwtant tOpiGS Sn High-&i;,' Latlg~ge Computer brzhitecture. i is the time to hold anFor these reasons, other ~PnfWWoo to ;ilH! C!iJt hhl ctiWi!~t StatEi nf at-t arid to meet the !-eseirck worKers in this area.

1980 or May 2?/28, preceding day.

1080 with a tutorial

on the

Five copies of the paper-s (togetker with an informative abstract) are due January 31, 1980. Please contact and/or submit your paper to Dr. Yaohan Chu Department of Computer Universitv of Marvland College P&k, Maryland USA

Science 20742 Pelmut

Serndt

Gomwnicationsin Distributed Systems

TheSpecial Interest Group3/4 'Computer DJanizatior and Operating Systems' of Gese"schaft fir Infonnatik e.V. (GI) is organizin, a work'Comnunications in Distributed Systems'. shop Tire workshop is addressed to product planners, system developers, and researchers concerned with communication aspects in distributed data processing systems. Tne program consists of a full-day session on tke Aspects of Architectur s followedbya panel on 1% Standardization of Communication in Distributed Systems. The second day covers TransPort Protocofs, Higher-Level Protocols, and finally Applications, Aspects of Implementation. P demon;tr?tion of the BERPEX pilot project is the closing event of this workshop.

Fleasa cantact ifieworkshop

chairman

for further

rie%iils. Prof. Dr. S. Schirdler Technis;iie 1EniwrrsitXt Berlin Fachbereick Infom;sr,ik Ernst-Reuter-Platz 7 D-1DDD Berlin 10

Helmut Berndt

Dsta Base TechnoI OPY Direct

Exeatt.ion

Arrhitecture

Indirect Execution Architecture High-Leve' Memory Stru-ture High-Leve‘ Control Structure High-Level :tachinetangriages

Intetmedi~te-LevelRlChlW C&lJiQp NW PrYPpYmuing LangWqa fat t4gh-&vel

Arshitrrtur? InterreIeti3n

Wween

ianguage

xii Arch tec-

Cata Base Technolcqy - especially for Large. Distributed and Intelligent Data Bases - was the topic of the second annual nu%ting of the &mm Clidpterof tht ACM, held in Bad NaWeim on Septmber 21 f 22, 1979. The contributions 0' this conference can be classified into four main fields entitled 'data base systemsr their general perfarmance claims', ‘wpport for data structuring', hardware and process development'and 'minicomputer implementations and distributed data bbses. Equivalent to this groupit@ the cxiference was divjded sessions each containing tkree Every lecture lrias foftowed by a short Q@W3. questioning an;' discussion.

into four

The first sesrjon contained problems of the interaction between oata base systems and oper-

ating systems, a design of a high-level data base language for the conceptual schema and a discussion of the use of data dictionary for integration of multiple structured data bases. The discussions at this session dealt mostly with the ability of minicomputers to perform as back-end data base machines. This aspect also was the main focus of the fourth session. Rere the principles of data base processor's architecture, the concrete back-end implementation of AOABAS on F3P 11 and proposals for stable transaction processing in distributed data base systems were discussed, The remaining six contributions dealt with a methodology for applied informatics, the description referenced autonomous memory access (DRAMA) an alternative to the von-Neumann principle and text field indexing as aids for data structuring. A special point of view for Togical data base structure design, trends in memory technnlogy and architectural principles for data base processors completed the range of data base technology of today, The conference, a!so documented in the was an exhausting but very interproceedings, esting summary of the state of the art in data base technology. Th.e&wceeding; Stuttgart 1979,

are avai lab Ze from Tmbner VeepZag, z&t;2 d. NiedereichhoZz pub%isher,

Z.5’38 Z-529-02421-7.

Christoph

Eientzel

“Did I Hear You Right?” Seventy attendees at the Language Implementation Validation WorLshoo. held at the National Computing Centre (Mandhester,UK)onlZ-13September, 1979,,treard19 speakers from five countries. Topics covered included descriptions of the techniques of language compiler testing, how testing services operate, why testing is necessary and what it achieves. In addition, the implications of formal certification (i.e., kitemark) type schemes for computing products were described internationally end the problems of attaining aired. The workshop s;?t out consistent testing toencourageaudience participation and thaz this objective was achieved was due to the br-tnging tsgether, apparently for the first time, of many people of differing, but legitimate, interests It is unlikely that anyone dein !*re subject. parted withoutawider, and in many cases deeper, knowledge of a reasonably straightforward technical subject surrounded by complex commercial pressures. Such a background inevitably led to strongly opposing views being expressed. %r example, as far as end-users are concerned, are language standards of any use or practical importance? Two such users spoke strongly - one arguing that. formal standardization was wasted effort, only to be countered by the second who said that the stability provided by such stan6,3rds was the life-blood of his business. 0~ the question of exactness of definition standards, Jay Valentine argued for ambiguity

of in