Extending the description logic EL with threshold concepts induced by concept measures
Extending the description logic EL with threshold concepts induced by concept measures
复制标题
使用由概念测量引起的阈值概念来扩展描述逻辑 EL
DOI:
10.1016/j.artint.2023.104034
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发表时间:
2024
期刊:
影响因子:
--
通讯作者:
Oliver Fernández Gil
中科院分区:
文献类型:
--
作者:
Franz Baader;Oliver Fernández Gil
In applications of AI systems where exact definitions of the important notions of the application domain are hard to come by, the use of traditional logic-based knowledge representation languages such as Description Logics may lead to very large and unintuitive definitions, and high complexity of reasoning. To overcome this problem, we define new concept constructors that allow us to define concepts in an approximate way. To be more precise, we present a family τ EL (m) of extensions of the lightweight Description Logic EL that use threshold constructors for this purpose. To define the semantics of these constructors we employ graded membership functions m, which for each individual in an interpretation and concept yield a number in the interval [0, 1] expressing the degree to which the individual belongs to the concept in the interpretation. Threshold concepts C⋈ t for⋈∈{<,≤,>,≥} then collect all the individuals that belong to C with degree⋈ t. The logic τ EL (m) extends EL with threshold concepts whose semantics is defined relative to a function m. To construct appropriate graded membership functions, we show how concept measures∼(which are graded generalizations of subsumption or equivalence between concepts) can be used to define graded membership functions m∼. Then we introduce a large class of concept measures, called simi-d, for which the logics τ EL (m∼) have good algorithmic properties. Basically, we show that reasoning in τ EL (m∼) is NP/coNP-complete without TBox, PSpace-complete wrt acyclic TBoxes, and ExpTime-complete wrt general TBoxes. The exception is the instance problem, which is already PSpace-complete without TBox wrt combined complexity. While the upper bounds hold for all elements of simi-d, we could prove some of the hardness results only for a subclass of simi-d. This article considerably improves on and generalizes results we have shown in three previous conference papers and it provides detailed proofs of all our results.
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DOI:
10.1007/s10817-007-9077-y
发表时间:
2007-10
期刊:
Journal of Automated Reasoning
影响因子:
--
作者:
Dmitry Tsarkov;Ian Horrocks;P. Patel-Schneider
通讯作者:
Dmitry Tsarkov;Ian Horrocks;P. Patel-Schneider
DOI:
10.1007/s10817-014-9305-1
发表时间:
2014-10-01
期刊:
JOURNAL OF AUTOMATED REASONING
影响因子:
--
作者:
Glimm, Birte;Horrocks, Ian;Wang, Zhe
通讯作者:
Wang, Zhe
影响因子:
5
作者:
Di Noia, Tommaso;Di Sciascio, Eugenio;Donini, Francesco M.
通讯作者:
Donini, Francesco M.
DOI:
10.1016/j.jal.2015.01.002
发表时间:
2015
期刊:
J. Appl. Log.
影响因子:
--
作者:
Andreas Ecke;R. Peñaloza;Anni
通讯作者:
Anni
DOI:
10.1145/3019612.3019715
发表时间:
2017
期刊:
Proceedings of the Symposium on Applied Computing
影响因子:
--
作者:
Franz Baader;Oliver Fernández Gil.
通讯作者:
Oliver Fernández Gil.