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An Answer Set Programming Frontend with Templates

Important Notice

DLT 1.7 will be released soon. For preliminary binaries (contains lot of bug fixes, etc.) please ask GB Ianni (ianniatmat.unical.it).

About DLT

DLT is a frontend for disjunctive datalog, extending Answer Set Programming with Template predicates, Higher order atoms and Frame Logic Syntax with nested frames.

DLT works as a pre-parser and can produce output compliant with the syntax of DLV, DLV-EX, DLV-HEX, and, partially, Lparse+Smodels

The Team

Project Coordinator

Sr. Developers

Jr. Developers

Contact us at dlt_AT_mat.unical.it.

Have a look at our gallery!


Linux (i586 - updated July 17, 2009), Windows (win32 - updated July 17, 2009) and Mac Os X (Leopard - updated July 25, 2008) binaries are available.

Note: since DLT invokes DLV, you will need the DLV executable. Please find all versions at the official DLV webpage. A limited compatibility with other solvers is also provided (see for instance Smodels).

In order to receive notifications about new releases and/or other important events regarding DLT, please contact us at dlt_AT_mat.unical.it

Documentation and examples

Online interface

Try out the online interface at ASP Tutorial Web Interface (Examples written in DLT are those with .dlt extension. This web interface currently runs DLT 1.5.1).



Some interesting example:

Download all examples in a .zip file.

  • The Official DLV Home Page.

  • An useful Java wrapper for DLV.

  • Some solvers that allow DLT as a preprocessor:
    • DLV-EX is an Answer Set Programming System with External Predicates, featuring a framework aimed at enabling ASP to deal with external sources of computation. It has been implemented and is currently maintained by members of the DLV team from Università della Calabria (some of them are involved also into the DLT project). Sooner DLV-EX features will be part of the DLV System.

    • DLV-Complex extends DLV-EX with function symbols, lists and set terms.

    • DLV-HEX features "second order" external predicates taking relational input an returning relational output, as well as higher order atoms.

Selected Publications

[AIMMM+08] Mario Alviano, Giovambattista Ianni, Alessandra Martello, Marco Marano. "Versatile Semantic Modeling of Frame Logic Programs under Answer Set Semantics". Unpublished. (.pdf)

[ACIM+07] Mario Alviano, Francesco Calimeri, Giovambattista Ianni, Alessandra Martello. "Frame Logic under Answer Set Semantics". In G. Fiumara, M. Marchi, and A. Provetti, editors, Proceedings of CILC 2007 (22nd Convegno Italiano di Logica Computazionale), S. Agata di Messina, Italy, June 2007. (.pdf)

[CIa+06] Francesco Calimeri, Giovambattista Ianni. "Template Programs for Disjunctive Logic Programming: An Operational Semantics". AI Communications, Vol. 19, N. 3, pp. 193-206, IOS Press, Nieuwe Hemweg 6B, 1013 BG Amsterdam, 2006. (.pdf)

[IIC+04b] Giovambattista Ianni, Giuseppe Ielpa, Francesco Calimeri, Adriana Pietramala, Maria Carmela Santoro. A System with Template Answer Set Programs. In Proceedings of the 9th European Conference, JELIA 2004, LNCS 3229 Springer Verlag, Lisbon, Portugal, September 27-30, 2004. (.pdf)

[IIC+04] Giovambattista Ianni, Giuseppe Ielpa, Francesco Calimeri, Adriana Pietramala, Maria Carmela Santoro. Enhancing Answer Set Programming with Templates. In Proceedings of the 10th International Workshop on Non-Monotonic Reasoning NMR2004. Whistler, BC, Canada, June 6 - 8, 2004. (.pdf)

[IIP+03] Giovambattista Ianni, Giuseppe Ielpa, Adriana Pietramala, Maria Carmela Santoro. Answer Set Programming with Templates. In Proceedings of the 2nd Intl. ASP'03 Workshop. Messina, Italy, September 26 - 28, 2003 - CEUR Workshop Proceedings. (pdf)

mwiki: dlt (last edited 2011-09-21 10:38:45 by GiovambattistaIanni)