Ciao-users November 2000

ciao-users@cliplab.org

5 participants
4 discussions

Can a Ciao module be called from Visual Basic?
by Zeno 30 Nov '00

30 Nov '00

I have used Amzi! prolog in the past, and enjoyed being able to build a front end in VB, whilst programming in Prolog for the brains of the application. Can Ciao be called from VB and use an ODBC (or ADO, etc.) recordset? Thank you, - Zeno

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Abort when extracting "aux.pl".
by Mark Morgan Adams 18 Nov '00

18 Nov '00

When using either PKUNZIP or WINZIP extraction fails on file "aux.pl". I have downloaded the CIAO-1.6p3 file several times with the same result. I have also tried WINZIP on the tarred archive with a failure on "aux.pl". Any help would be appreciated, either a fix or the text of the file "aux.pl". Thanks, Mark M. Adams adams.mark(a)iname.com

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Research Positions at EPFL-LITH
by Vincenzo Pallotta 15 Nov '00

15 Nov '00

The Swiss Federal Institute of Technology in Lausanne (EPFL) is looking for its research laboratory in Theoretical Computer Science (LITH) at the Computer Science Department (DI) for: JUNIOR and SENIOR RESEARCHERS in the following domains: - natural language processing - analysis, indexing and querying of multimedia documents - dialogue and human-computer interaction - structured document modelling Essential requirements is a computer science degree (M.Sc. or Ph.D.) Candidates must speak English. Knowledge of French or desire to learn French would be a welcome extra. The ideal candidate would be one who has past experience in one or more of the following subject and an enthusiasm for developing and exploiting new approaches to problem solving: Natural Language Engineering: Advanced techniques and programming languages for Natural Language Processing (Logic Programming, Constraint programming, Agent oriented programming, Java, Perl) Multimodal Interfaces Dialogue Management User modelling Video and Image analysis and 3D object description Multimedia documents: hypertexts technology XML The position will offer flexibility in the choice of research topics within the context of ongoing projects at the laboratory. Initial appointment to these positions will be for the period of a year with the potential of renewal for a second year. Starting date: as soon as possible Salary will be compatible with departmental rates for graduate and postdoctoral research fellows and can be at 100% or 50%. Please direct inquiries and applications to: Prof. Giovanni Coray EPFL-DI-LITH IN-Ecublens 1015 Lausanne Tél. 021 693 25 72 Fax 021 693 52 78 e-mail: coray(a)di.epfl.ch http://lithwww.epfl.ch

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Problemas con persdb
by Borja García-Almuzara Rodríguez 10 Nov '00

10 Nov '00

Hola, Soy un estudiante de la Facultad de Informatica que asistio a las clases de Extensiones de Programacion Logica el año pasado. En dicho año aprendimos a usar los llamados modulos activos como una especie de mini servidores, y a usar las bases de datos persistentes. El problema que tengo es que no consigo hacer funcionar nada que tenga una base de datos persistente, ni siquiera los ejemplos que vienen en la documentacion. El programa de prueba que uso es el que viene en la documentacion: :- include(library(persdb)). %% Required declarations for persistent_dir/2. :- multifile persistent_dir/2. :- data persistent_dir/2. %% Declare the directory associated to the key "db" where the %% persistence sets of the persistent predicates are stored: persistent_dir(db,'./'). %% Declare a persistent predicate: :- persistent(bar/1, db). %% Read a term, storing it in a new fact of the persistent predicate %% and list all the current facts of that predicate main:- read(X), passertz_fact(bar(X)), findall(Y,bar(Y),L), write(L). Luego, escribo en el toplevel: make_exec('./prueba.pl',_). obteniendo asi el ejecutable. Tras ejecutarlo obtengo el siguiente mensaje de error: {ERROR: No handle found for thrown error error(existence_error(source_sink,/temp/prolog/user/bar_1.pl),-(/($open,3),1))} con lo cual no consigo nada. Creo que es porque no se crea bien la base de datos, que supongo que sera el fichero "bar_1.pl" que intenta abrir. He intentado todo lo que se me ha ocurrido y no he conseguido nada. Si cargo el programa en el toplevel (uso las emacs) obtengo el error: ensure_loaded('c:/temp/prolog/prueba.pl'). {ERROR: persdbrt:init_persdb/0 - undefined predicate} yes ?- He notado que si voy al directorio /library/persdb/ y cargo persdb.pl y la cargo en el toplevel (con CTRL-C-L) me da el mismo error (como si la libreria no estuviera bien?). He intentado crear el fichero /user/bar_1.pl a mano, pero entonces tras escribir lo que me pide con el read obtengo el error: {ERROR: No handle found for thrown error error(existence_error(procedure,/(user:passertz_fact,1)),/(user:passertz_fact,1))} ¿ Me puede indicar alguien que es lo que estoy haciendo mal ? Muchas Gracias por adelantado, Borja Garcia-Almuzara Rodriguez email: d960022(a)zipi.fi.upm.es borja_g(a)teleline.es NOTA: Estoy probandolo todo en el W98, con el ciao-1.7p30Win32

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Ciao-users November 2000