**年来, 随着互联网技术和应用模式的迅猛发展, 引发了互联网数据规模的爆炸式增长,
其中包含大量有价值的知识. 如何组织和表达这些知识, 并对其进行深入计算和分析备受关注 …

Recent years have seen an increasing interest in ontology-mediated query answering, in
which the semantic knowledge provided by an ontology is exploited when querying data …

Abstract Knowledge graphs such as Yago and Freebase have become a powerful asset for
enhancing search, and are being intensively used in both academia and industry. Many …

Ontologies have recently became a popular mechanism to expose relational database
(RDBs) due to their ability to describe the domain of data in terms of classes and properties …

Abstract The OWL Reasoner Evaluation competition is an annual competition (with an
associated workshop) that pits OWL 2 compliant reasoners against each other on various …

In the era of mobile big data, data driven intelligent Internet of Things (IoT) applications are
becoming widespread, and knowledge-based reasoning is one of the essential tasks of …

Module extraction is the task of computing a (preferably small) fragment M of an ontology O
that preserves a class of entailments over a signature of interest Σ. Extracting modules of …

Answering conjunctive queries over ontology-enriched datasets is a core reasoning task for
many applications. Query answering is, however, computationally very expensive, which …

We study the problem of rewriting a Disjunctive Datalog program into an equivalent plain
Datalog program (ie, one that entails the same facts for every dataset). We show that a …

In this paper, we propose a new method for automatic query-reply in social network.
Information extraction and query-oriented summarization method are applied here to reply …