Iterative Learning of Answer Set Programs from Context Dependent Examples
File(s)ArchiveVersion.pdf (773.02 KB)
Accepted version
Author(s)
Law, M
Russo, A
Broda, K
Type
Conference Paper
Abstract
In recent years, several frameworks and systems have been proposed that extend Inductive Logic Programming (ILP) to the Answer Set Programming (ASP) paradigm. In ILP, examples must all be explained by a hypothesis together with a given background knowledge. In existing systems, the background knowledge is the same for all examples; however, examples may be context-dependent. This means that some examples should be explained in the context of some information, whereas others should be explained in different contexts. In this paper, we capture this notion and present a context-dependent extension of the Learning from Ordered Answer Sets framework. In this extension, contexts can be used to further structure the background knowledge. We then propose a new iterative algorithm, ILASP2i, which exploits this feature to scale up the existing ILASP2 system to learning tasks with large numbers of examples. We demonstrate the gain in scalability by applying both algorithms to various learning tasks. Our results show that, compared to ILASP2, the newly proposed ILASP2i system can be two orders of magnitude faster and use two orders of magnitude less memory, whilst preserving the same average accuracy.
Date Issued
2016-10-14
Date Acceptance
2016-08-22
ISSN
1471-0684
Publisher
Cambridge University Press
Start Page
834
End Page
848
Journal / Book Title
Theory and Practice of Logic Programming
Volume
16
Issue
5-6
Copyright Statement
© 2016 Cambridge University Press. This paper has been accepted for publication and will appear in a revised form, subsequent to peer-review and/or editorial input by Cambridge University Press.
Sponsor
Engineering & Physical Science Research Council (EPSRC)
Grant Number
EP/K033425/1
Source
32nd International Conference on Logic Programming
Subjects
Computation Theory & Mathematics
0803 Computer Software
0801 Artificial Intelligence And Image Processing
Publication Status
Published
Start Date
2016-10-16
Finish Date
2016-10-21
Coverage Spatial
New York City, NY, USA